The trend for the ionic radius as the atomic number increases in Period 2 is that it decreases.
In general, the ionic radius of an element is the distance between the nucleus and the outermost stable electron shell of an atom or ion. As the atomic number increases, the number of protons in the nucleus also increases, which creates a greater positively charged force (the positively charged protons) pulling the electrons closer to the nucleus. This causes the radius of the outermost stable electron shell to decrease, and therefore the ionic radius also decreases.
In Period 2, the atomic number increases from Z = 3 (Lithium) to Z = 10 (Neon). The ionic radius of Li+ is 0.76 Å and the ionic radius of Ne2+ is 0.43 Å, Therefore, the ionic radius decreases as the atomic number increases within Period 2.
Water waves in a lake travel 4.4 meter in 1.8 s. The period of oscillation is 1.2 s. What is their wavelength?
Answer:
3.6 meters
Explanation:
The wavelength of a water wave is the distance between two successive peaks or troughs of the wave.
To find the wavelength of the water waves in the lake, we can use the formula:
wavelength = speed / frequency
where speed is the speed of the wave and frequency is the number of cycles (peaks or troughs) that pass a fixed point in a given time period. The frequency of a wave is related to its period, which is the time it takes for one complete cycle (peak or trough) to pass a fixed point. The frequency of a wave is the reciprocal of its period, so we can rewrite the formula as:
wavelength = speed / (1 / period)
Plugging in the values from the problem, we get:
wavelength = 4.4 meters / (1 / 1.2 seconds)
wavelength = 4.4 meters / (1.2 seconds)
wavelength = 3.6 meters
So the wavelength of the water waves in the lake is 3.6 meters.
Water waves in a lake travel 4.4 meters in 1.8 s. The period of oscillation is 1.2 s. 3.6 meters is their wavelength.
What is wavelength?The wavelength of a water wave is the spatial arrangement between two successive peaks or troughs of the wave.
To find the wavelength of the water waves in the lake, use the formula:
Wavelength = speed/frequency
Where speed is the speed of the wave and frequency is the number of cycles that pass a fixed point in a given time period.
The frequency of a wave is related to its period, which is the time it takes for one complete cycle to pass a fixed point. The frequency of a wave is the reciprocal of its period, the formula is given as:
wavelength = speed / (1 / period)
Substitute the values from the given information, we get:
wavelength = 4.4 meters / (1 / 1.2 seconds)
wavelength = 4.4 meters / (1.2 seconds)
wavelength = 3.6 meters
Thus, the wavelength of the water waves in the lake is 3.6 meters.
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A balloon is filled with 2.2 L of gas at a pressure of 108kPa and a temperature of 21 degrees celsius. It is then taken down to the bottom of the ocean where the pressure is 11.8 MPa and the temperature is 6 degrees celsius. Calculate the new volume of a balloon.
The new volume of a balloon, given that it was initially filled with a 2.2 L of gas at a pressure of 108 KPa and a temperature of 21 degrees celsius is 0.019 L
How do I'd terminer the new volume of the balloon?First, we shall list out the given parameters from the question. This is given below:
Initial volume (V₁) = 2.2 LInitial pressure (P₁) = 108 KPaInitial temperature (T₁) = 21 °C = 21 + 273 = 294 K New pressure (P₂) = 11.8 MPa = 11.8 × 1000 = 11800 KPaNew temperature (T₂) = 6 °C = 6 + 273 = 279 K New volume (V₂) = ?Using the combined gas equation, we can obtain the new volume of the balloon as illustrated below:
P₁V₁ / T₁ = P₂V₂ / T₂
(108 × 2.2) / 294 = (11800 × V₂) / 279
Cross multiply
11800 × V₂ × 294 = 108 × 2.2 × 279
Divide both sides by 11800 × 294
V₂ = (108 × 2.2 × 279) / (11800 × 294)
V₂ = 0.019 L
Thus, from the above calculation, we can conclude that the new volume is 0.019 L
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what are similarities and differences in the atoms structure among the elements going down a family that explain these trends
All elements in a family share the same number of valence electrons in their outermost energy level, which explains the similar chemical behavior of the elements in a family.
Exploring the Structure of Atoms in a Family and Its Impact on Chemical PropertiesSimilarities: All elements in a family have the same number of valence electrons in their outermost energy level. This shared valence shell is responsible for the similar chemical behavior of the elements in a family.Differences: As you move down a family, the atomic number of the elements increases, which means there are more protons and electrons in the atom.This increases the nuclear charge, which causes the electrons to be more strongly attracted to the nucleus. This results in the electrons being held more tightly and a decrease in ionization energy and atomic radius as you move down a family.
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How many moles of hydrogen are needed to react with 7.1 moles of chlorine .
H2 + Cl2 --> 2 HCl
round to one decimal place
The number of moles of hydrogen that will be needed to react with 7.1 moles of chlorine would be =7.1 moles of hydrogen.
What is chlorine?Chlorine is defined as the one of the first 20 elements of the periodic table with the symbol of Cl and with the atomic number of 17.
From the given equation;
2 moles of hydrogen = 2 moles of chlorine
X moles of hydrogen = 7.1 moles of chlorine
Make X moles the subject of formula;
X moles = 2× 7.1/2 = 7.1 moles of hydrogen.
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draw the expanded structural formula for the following compound.
4-bromobutanone
The structure of 4-bromobutanone is CH3-C(=O)-CH2-CH2-Br.
To solve such questions, we need to break down the given IUPAC (International Union of Pure and Applied Chemistry) name. The organization has laid certain rules for nomenclature of organic compouds and we shall use those rules to derive the structure of the given compound. 4-Bromo means that a Br (Bromine group - a halogen) is attached at the 4' position of the parent chain. Here, the parent chain, having the maximum number of Carbon atoms is butane (according to nomenclature rules, but- prefix means that it has 4 Carbons in an alkane chain). Since -on (suffix) has been used, we know that a keto group(=O) has been attached. This ketone group is a primary functional group of highest priority in the functional groups present in this compound, thus, numbering of the butane chain will be such that this keto group gets the minimum number at the Carbon on which it is attached. It can't be attached on 1' Carbon, because then it would have become an aldehyde (with suffix -al). Hence, this keto group is present on 2' Carbon.
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College Board AP Classroom Unit 2 Progress Check: FRO Ruochen Jin X < 10f 1 > Question 1 A For parts of the free-response question that require calculations, clearly show the method used and the steps involved in arriving at your answers. You must show your work to receive credit for your answer. Examples and equations may be included in your answers where appropriate Answer the following questions about N, and N, HA (a) in the box below.draw the complete Lewis electron-dot diagram of N. Submit t Upload files (PDF, JPG, GIF, PNG, TXT, Word, Excel, Powerpoint file formats supported) College Board AP Classroom Unit 2 Progress Check: FRO Ruochen Jin X 1of1 > Submit Upload files (PDF, JPG, GIF, PNG, TXT, Word, Excel, Powerpoint file formats supportod) 0/2 File Limit (b) Based on the Lewis electron-dot diagram that you drew, is the N molecule polar? Explain. 0/10000 Word Limit College Board AP Classroom Unit 2 Progress Check: FRO Ruochen Jin X O 10f1 > The following graph shows the potential energy of two nitrogen atoms versus the distance between their nuclei Submit O Potential Energy Internuclear Distance (c) On the graph, indicate the distance that corresponds to the bond length of the N, molecule by placing an X on the horizontal axis. College Board AP Classroom Unit 2 Progress Check: FRO Ruochen Jin X 10f1 > t Upload files (PDF, JPG, GIF, PNG, TXT, Word, Excel, Powerpoint file formats supported) 0/2 File Limit Submit (d) On the graph, which shows the potential energy curve of two N atoms, carefully sketch a curve that corresponds to the potential energy of two O atoms versus the distance between their nuclel. Upload files (PDF, JPG, GIF, PNG, TXT, Word, Excel, Powerpoint file formats supported) 0/2 File Limit N, can react with HI to form the compound NHL (e) A sample of NH has a mass of 25 g. Identify the numerical quantity that is needed to convert the number of grams of N2Hto the number of moles of N2H4. (You do not need to do the actual calculation.) t 1 t Upload files (PDF, JPG, GIF, PNG, TXT, Word, Excel, Powerpoint file formats supported) 0/2 File Limit College Board AP Classroom Unit 2 Progress Check: FRO Ruochen Jin X 10f1 > D/2 File Limit (f) The Lewis electron-dot diagram of N2H4 is shown below. H-N-N-H Submit HH compare the length of the nitrogen-to-nitrogen bond in N, with the length of the nitrogen-to-nitrogen bond in N.H. (1) Based on the Lewis electron-dot diagrams of N, and N H 0/10000 Word Limit (II) Based on the Lewis electron-dot diagrams of N, and N, H. compare the strength of the nitrogen-to-nitrogen bond in N, with the strength of the nitrogen-to-nitrogen bond in N,H. 0/10000 Word Limit (III) Identify the hybridization of the N atoms in N,H.. BI VE 0/10000 Word Limit
(a) The Lewis electron-dot diagram of N2 is:
N
|
N
(b) The N2 molecule is nonpolar. The Lewis electron-dot diagram shows that the electrons are shared equally between the two nitrogen atoms, so the electron density is symmetrical around the molecule.
(c) The bond length of the N2 molecule is the distance at which the potential energy is at its minimum on the graph. The X should be placed on the horizontal axis at the point where the curve reaches its lowest point.
(d) The potential energy curve of two O atoms versus the distance between their nuclei would be similar to the curve shown for N2, but would have a lower minimum energy, corresponding to the stronger O-O bond.
(e) To convert the number of grams of N2H4 to the number of moles of N2H4, the molar mass of N2H4 is needed.
(f) (1) The nitrogen-to-nitrogen bond in N2 is shorter than the nitrogen-to-nitrogen bond in N2H4 because in N2 the nitrogen atoms share a single bond, while in N2H4 the nitrogen atoms share a double bond.
(II) The nitrogen-to-nitrogen bond in N2 is weaker than the nitrogen-to-nitrogen bond in N2H4 because in N2 the nitrogen atoms share a single bond, which is weaker than the double bond in N2H4.
(III) The N atoms in N2H4 are sp3 hybridized.
The Lewis electron-dot diagramThe subject is about Lewis electron-dot diagrams, which are used to represent the valence electrons of atoms and molecules. The questions in this AP Classroom Unit 2 Progress Check ask about the Lewis electron-dot diagram of the nitrogen molecule (N2), whether the molecule is polar, the bond length and potential energy of N2 and O2 molecules, the conversion of the number of grams of N2H4 to the number of moles of N2H4, and the comparison of the length and strength of the nitrogen-to-nitrogen bond in N2 and N2H4, as well as the hybridization of the nitrogen atoms in N2H4.
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Decide whether the Lewis structure proposed for each molecule is reasonable or not. molecule proposed Lewis structure Is this a reasonable structure? If not, why not? Yes, it's a reasonable structure. O No, the total number of valence electrons is wrong. BH 1—B— H* The correct number is: 0 No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: U Yes, it's a reasonable structure. No, the total number of valence electrons is wrong. OF F= :0: The correct number is: 0 No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: U Yes, it's a reasonable structure. O No, the total number of valence electrons is wrong. -c-6 The correct number is: 0 No, some atoms have the wrong number of electrons around them. The symbols of the problem atoms are: 0 * If two or more atoms have the wrong number of valence electrons around them, just enter the chemical symbol for the atom as many times as necessary. For example, if two oxygen atoms have the wrong number of electrons around them, enter the symbol O twice.
Lewis structures are diagrams that represent the valence electrons of atoms within a molecule.
The Lewis structure Is this a reasonable structure?Electrons exist outside of an atom ‘s nucleus and are found in principal energy levels that contain only up to a specific number of electrons.The outermost principal energy level that contains electrons is called the valence level and contains valence electrons.Lewis symbols are diagrams that show the number of valence electrons of a particular element with dots that represent lone pairs.Lewis symbols do not visualize the electrons in the inner principal energy levels.In the Lewis symbol for an atom, the chemical symbol of the element (as found on the periodic table) is written, and the valence electrons are represented as dots surrounding it. Only the electrons in the valence level are shown using this notation. Electrons that are not in the valence level are not shown in the Lewis symbol. The reason for this is that the chemical reactivity of an atom of the element is solely determined by the number of its valence electrons, and not its inner electrons.To learn more about Lewis structure refer to;
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Laura usually uses vinegar to clean her knives but since she doesn't have any handy, she can soak a sponge in what chemical and use it to clean her blades and remove rust?
Question 7 options:
bleach
peroxide
ammonia
turpentine
Laura usually uses vinegar to clean her knives but since she doesn't have any handy, she can soak a sponge in a chemical known as peroxide and use it to clean her blades and remove rust which is therefore denoted as option B.
This is referred to as an iron oxide, which is usually reddish-brown in color and it is formed by the reaction of iron and oxygen in the catalytic presence of water or air moisture.
This is therefore one of the reasons why it is necessary for us to keep tools which have a metallic content in a cool and dry place so as to prevent this type of corrosive reaction.
Hydrogen peroxide is known as a chemical compound which is used to dissolve accumulated rust from metal surfaces and can even break up the entire tarnish in some cases ad is therefore the reason why peroxide was chosen as the correct choice in this scenario.
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Which of the following is NOT a strong electrolyte? NaNO_3 BaCl_2 H_2CO_3 H_2SO_4 All of these are strong electrolytes
Carbonic acid ([tex]H_{2}CO_{3}[/tex]) is a weak acid as for its Alpha is low so it partially dissociates in water and an equilibrium is established.
We know salts of Alkaline or alkaline Earth metals are strong electrolytes so the first two are strong electrolytes
We also know Sulphuric acid ( [tex]H_{2}SO_{4}[/tex]) is a strong acid hence a strong electrolyte
Electrolytes are ionic species which can dissociate into their constituent ions in solutions.
Alpha is a constant for particular electrolytes It determines the extent of dissociation. If alpha is high so it will fully dissociate in the solution and will be called a strong electrolyte. If alpha is low it will partially dissociate in the solution and will be called a weak electrolyte
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in order for a pathway to produce its products it must have sufficient inputs. which of the answer choices must be directly supplied to the citric acid cycle for it to proceed? select all that apply.
The inputs of TCA cycle are: 2 Acetyl CoA, 6NAD+, 2 FAD, 2 ADP+Pi. The outputs are 4CO2, 6NADH, 6H+, 2 FADH2, 2ATP and 2 CoA, Therefore the correct options are (a), (b), (c), and (d).
Is citric acid bad for people?Acidic citrus is completely secure. It is broken by your body and excreted through urination. In fact, it could even help prevent kidney problems caused by calcium oxalate. As according studies, lemon juice helps stop the production of stones.
Is lemon juice the same as citric acid?Citric acid and lemon juice differ within this citric acid is a concentrated acid component, whereas citric acid, water, vitamin C, and other components can all be found in lemon juice.
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The complete question is -
in order for a pathway to produce its products it must have sufficient inputs. which of the answer choices must be directly supplied to the citric acid cycle for it to proceed? select all that apply.
(i)Acetyl CoA (ii)NAD+ (iii)FAD (iv)ADP (v)NADH (vi)ATP (vii)Pyruvate (viii) Glucose
Below is the SN2 reaction between (R)-2-chlorobutane and cyanide (CN) 5th attempt See Periodic Table SeeHint Please draw all four bonds at chiral centers :CI: N- Draw the product that will be produced. Be sure to draw in any hydrogen at chiral centers. Add lone pairs of electrons
The SN2 reaction between (R)-2-chlorobutane and cyanide results in the formation of an acyl cyanide (CH3-CH(C(=O)-N-C#N)) product, which is chiral and has two hydrogen atoms at the chiral center.
Here is the structure of the product that will be produced:
CH3-CH(Cl)-C(=O)-N-C#N
The reaction is an SN2 substitution reaction, with (R)-2-chlorobutane (CH3-CH(Cl)-CH3) as the substrate and cyanide (CN-) as the nucleophile. The reaction proceeds by a backside attack of the cyanide anion onto the carbon with the chlorine substituent, resulting in a transition state where the chlorine is displaced and the cyanide is bound to the carbon. This transition state is then followed by a proton transfer from the carbon to the nitrogen of the cyanide to form the product, an acyl cyanide (CH3-CH(C(=O)-N-C#N)). The product is chiral, and two hydrogen atoms are present at the chiral center.
The SN2 reaction between (R)-2-chlorobutane and cyanide results in the formation of an acyl cyanide (CH3-CH(C(=O)-N-C#N)) product, which is chiral and has two hydrogen atoms at the chiral center.
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Em -Deducing the block of an element from an olectron configuration Some patterns of electron configuration are listed below. In each case, [G] stands for a noble-gas core and n, m, or o stand for integer numbers like 1, 2, 3 and so on. Think about the chemical elements made of atoms with an electron configuration that matches each pattern. In what block or blocks of the Periodic Table would these elements lie? Would they be metals, nonmetals, metalloids, some of each? Use your answers to these questions to complete the table. location of elements (check all that apply) electron configurationn of atoms blocks metals or nonmetals? metals nonmetals metaloids sap ad?f nonmetals metalods metals nonmetals 0 metaloids In
The electron configuration [G] n m o indicates that the element will be located in the nth block of the Periodic Table, which is the s, p, d, or f block depending on the value of n.
Depending on the element, it can be a metal, nonmetal, or metalloid. For example, if n = 2, the element will be located in the d block and can be a metal, nonmetal, or metalloid. If n = 4, the element will be located in the f block and can be a metal or nonmetal, but not a metalloid.
Depending on the value of n, the element will be located in the s, p, d, or f block of the periodic table. If n = 2, it can be a metal, nonmetal, or metalloid. If n = 4, it can be a metal or nonmetal, but not a metalloid.
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if you had 8.39 x 10^15 carbon atoms how many g K2CO3 total would be there?
With 8.39 x [tex]10^1^5[/tex] carbon atoms, the amount of [tex]K_2CO_3[/tex] would be 0.000001862 grams.
Percent compositionThe percent composition of carbon atoms in [tex]K_2CO_3[/tex] is calculated as follows:
Percent composition of carbon = mass of carbon/mass of [tex]K_2CO_3[/tex]
= 12/138 = 8.70%
6.022 x [tex]10^{23[/tex] atoms = 1 mole of a substance
8.39 x [tex]10^1^5[/tex] carbon atoms = 8.39 x [tex]10^1^5[/tex]/6.022 x [tex]10^{23[/tex]
= 1.35 x [tex]10^{-8[/tex] mol
Mass of 1.35 x [tex]10^{-8[/tex] mol carbon = 1.35 x [tex]10^{-8[/tex] x 12
= 1.62 x [tex]10^{-7[/tex] grams
If 8.70% = 1.62 x [tex]10^{-7[/tex] grams
100% = 1.62 x [tex]10^{-7[/tex] x 100/8.7
= 0.000001862 grams of [tex]K_2CO_3[/tex]
In other words, if I have 8.39 x [tex]10^1^5[/tex] carbon atoms, that would be equivalent to 0.000001862 grams of [tex]K_2CO_3[/tex].
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Write the balanced chemical equation for the reaction of solid tetraphosphorus hexoxide with water.
Answer:
P4O6(s) + 6 H2O(l) -> 4H3PO3(aq).
Explanation:
What is the formula for Tetraphosphorus Hexoxide?
Answer: P₄O₆
how is H3PO3 formed???
H3PO3 is produced by the slow combustion reaction of phosphorus in the form of a white volatile powder.
The salt of phosphorus acid is called phosphites. Phosphoric acid is prepared by the reaction of phosphorus trichloride that is PCl 3 with water.
Which transformation is sublimation? A) liquid → solid ( EXO) B) liquid → gas( ENDO) C)solid → gas (EXO) D) solid → gas ( ENDO) E) gas → liquid ( ENDO)
Option D, solid → gas ( ENDO) transformation is sublimation.
Sublimation refers to the process in which a solid substance directly converts into its gaseous phase, while skipping conversion to liquid phase. The usual order of conversion is solid to liquid to gas, but sublimation skips the intermediate stage. This would mean that to let such a tranformation reaction (such as sublimation) to occur, we need to provide extra energy to the system. In other words, sublimation is an endothermic process (the reason why Option c is not the correct answer). Fusion, vaporization, and sublimation are all endothermic processes, whereas, freezing, condensation, and deposition are exothermic processes ( meaning, that such reactions would take place spontaneously as heat/energy is being released).
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The force of gravity between the Sun and Jupiter is 4 x 1023 N. If the mass of the Sun is 2 x 1030 kg and the sun and Jupiter are 7 x
10¹ m apart, what is the mass of Jupiter? Show your work.
The force of gravity between the Sun and Jupiter is 4 x 10²³ N. The mass of Jupiter is 18.33 × 10²⁶ kg.
What is a force of gravity?The gravitational force is what pushes mass-containing objects toward one another. We frequently consider the pull of gravity from the Earth. Your body is kept on the ground by this force.
F = G × m₁ × m₂ / r²
Where G is the universal gravitational constant.
[ G = 6.67 × 10⁻¹¹ N . m² ]
m₂ = r² × F / G × m₁
m₂ = { ( 7.8 x 10⁻¹¹ )² × ( 4 × 10^23 ) } / { ( 6.67 × 10⁻¹¹ ) × ( 1.99 x 10³⁰ ) }
m₂ = ( 60.84 × 10²² × 4 × 10²³) / ( 13.27 × 10¹⁹ )
m₂ = ( 243.36 × 10⁴⁵ ) / ( 13.27 × 10¹⁹)
m₂ = 18.33 × 10^45 × 10⁻¹⁹
m₂ = 18.33 × 10²
m₂ = 18.33 × 10^26 kg.
Therefore, the mass of Jupiter is 18.33 × 10²⁶ kg.
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Classify the following elements as metal, nonmetal, or metalloid (semimetal). Drag the appropriate elements to their respective bins. Metal Nonmetal Metalloid
Metal are -K , -Mn. Nonmetal are -P, -Ne. Metalloid are -Ge ,-As.
How is an element categorized as a metal?Metals may be hammered into sheets and are malleable, ductile, and excellent conductors of heat and electricity (they can be drawn into wire). At room temperature, the majority of metals are solids and have a distinctive silvery luster (except for mercury, which is a liquid).The other two are non-metals, but calcium and potassium are both metals.We may more methodically and orderly evaluate and comprehend characteristics of elements and their compounds with the aid of classification. We can anticipate the characteristics of the elements and the compounds they form based on their places in the Periodic Table and vice versa thanks to classification.To learn more about Metal refer to:
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calculate the relative atomic mass of an element R given that the relative abundance of 63R and 65R are 68% and 32% respectively
Answer:
As you know, the average atomic mass of an element is determined by taking the weighted average of the atomic masses of its naturally occurring isotopes.
Simply put, an element's naturally occurring isotopes will contribute to the average atomic mass of the element proportionally to their abundance.
avg. atomic mass
=
∑
i
(
isotope
i
×
abundance
x
)
When it comes to the actual calculation, it's easier to use decimal abundances, which are simply percent abundances divided by
100
.
So, you know that copper has two naturally occurring isotopes, copper-63 and copper-65. This means that their respective decimal abundance must add up to give
1
.
If you take
x
to be the decimal abundance of copper-63, you can say that the decimal abundance of copper-65 will be equal to
1
−
x
.
Therefore, you can say that
copper-63
x
⋅
62.9296
u
+
copper-65
(
1
−
x
)
⋅
64.9278
u
=
63.546
u
Solve this equation for
x
to get
62.9296
⋅
x
−
64.9278
⋅
x
=
63.546
−
64.9278
1.9982
⋅
x
=
1.3818
⇒
x
=
1.3818
1.9982
=
0.69152
This means that the percent abundances of the two isotopes will be
69.152
%
→
63
Cu
30.848
%
→
65
Cu
H2(g) + l2(g) -- 2H1(g)
A student makes the following statements:
Hydrogen always has the same oxidation number, so it has an oxidation number of +1 in both the reactant H2 and product HI.
lodine is in Group VIIA, so it has an oxidation number of -1 in both the reactant l2 and product HI.
Neither hydrogen nor iodine changes oxidation states, so the reaction is not a redox reaction.
In three to five sentences, describe the mistake that the student made, and determine whether or not the reaction is a redox reaction.
Explain your answer.
(4 points)
9E
Short Answer Rubric (4 points)
The given chemical equation is a redox reaction as it involves no net change in the oxidation number of reactants and products,hence the oxidation number remains the same.
What is a redox reaction?Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.
While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.
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Which of the following bonds is a polar covalent bond?
Li-Li, Cl-Cl, H-Cl, Li-Cl
The bond which a polar covalent bond is H-Cl.
Because a bond is made up of two electrons, and a covalent bond is formed by equal sharing of electrons. So, if two atoms wish to form a covalent bond, then each atom contributes one electron for the bond.
H-Cl is a polar molecule. It is because the Chlorine (Cl) atom in the H-Cl molecule is more electronegative and does not split the bonding electrons fairly with Hydrogen (H). But H₂ And Cl₂ are non-polar due to the similar electronegativity of both the atoms in the molecule H2 and Cl2.
The electronegativity of Chlorine (Cl) is higher than Hydrogen (H), because Chlorine (Cl) pulls the bonded pair of electrons towards itself. Hence, the bond formed between Hydrogen (H) and Chlorine (Cl) is a polar covalent bond and the compound is known as polar covalent compound.
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The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide (CO2) is 44.01 g/mol. What mass of CO2, in grams, will form when 8.94 g O2 completely react
The mass 6.15 g of CO2 will form when 8.94 g O2 completely react. This is calculated by using the expression of molar mass.
The molar mass of a chemical compound is defined as the ratio between the mass and the amount of substance of any sample of said compound. The molar mass is a bulk, not molecular, property of a substance. The mass in grams of one mole of substance is called molar mass. Each element has its own unique molar mass.
CH4 + 2O2 → CO2 + 2H2O
The balanced chemical equation tells us unequivocally that 16 g of methane gas reacts with 32 g of dioxygen gas to give 44 g of carbon dioxide, and 36 g of water. These masses represent the molar equivalence of reactants and products.
8.94g / 32.00 g/mole = 0.2794 mole
So the moles of CO2 that is formed from 0.2794 mole is,
= 0.2794 moles/2
= 0.1397 mole.
Mass of CO2 = moles of CO2 multiplies molar mass of CO2
= 0.1397 mole x 44.01 g/mole
= 6.15 g.
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Here, question is incomplete. The chemical reaction is not given. The complete question is,
The chemical equation below shows the combustion of methane (CH4).
CH4 + 2O2 -> CO2 + 2H2O
The molar mass of oxygen gas (O2) is 32.00 g/mol. The molar mass of carbon dioxide (CO2) is 44.01 g/mol. What mass of CO2, in grams, will form when 8.94 g O2 completely react?
For the molecule COBr2 Upload the correct Lewis structure (including resonance forms, if com to the PL What is the geometry of the molecule? Is it polar or non-polar? What is the hybridization of the central atom?
COBr2 is polar in nature and prefers to dissolve in polar solvents like water, ethanol, and methanol, among others, cobr2 is soluble in polar solvents.
Which way does Cobr2 polarize?Because cobr2 is polar in nature and prefers to dissolve in polar solvents like water, ethanol, and methanol, among others, cobr2 is soluble in polar solvents.Lewis structures use a 2D representation to show where the electrons are placed, whereas molecular geometry only uses 3 dimensions when the bond atoms are present (whether its lone-pair or atom).Given that COBr2 has a double bond, we anticipate that the Br-C-Br and Br-C-O angles will be only slightly above and below 120 degrees, respectively.To learn more about polar solvents refer to:
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give the general formula for any cyclic alkene, that is, a cyclic hydrocarbon with one double bond.
The general formula for a cyclic alkene is CnH2n, where n is the number of carbon atoms in the cyclic structure.
The double bond is typically placed between two carbon atoms, but may also involve one or more atoms of other elements such as nitrogen or oxygen.
The double bond is represented by a line connecting the two atoms. Cyclic alkenes can have any number of double bonds, depending on the size of the cyclic structure and the elements involved. Cyclic alkenes with more than one double bond can be expressed as CnH2n-2x, where x is the number of double bonds.
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1. Write the balanced equation for the bromination of acetanilide.
2. Write the complete reaction mechanism for the bromination of acetanilide using arrows to show electron flow and including all resonance structures.
Balance equation for the bromination of acetanilide is,
C6H5NHCOCH3+Br2→BrC6H4NHCOCH3+HBr C Br C = 6 H 5 N H C O C H 3 + B r 2 6H 4N H COC H 3+ HBr.
The bromination of acetanilide takes place in which solvent?In addition, bromination is done in aqueous medium without the use of chlorinated solvents. Acetanilide (1 g, 0.008 mol) and ethanol were combined in a conical flask (15 ml). The addition of a bromine molecule is the process known as bromination. Bromine is typically added electrophilically, which causes the bromination to occur.
An approach for brominating acetanilide with bromine in acetic acid. Be as comprehensive as feasible and incorporate all pertinent resonance structures.
A balanced chemical reaction is what?A chemical equation is said to be balanced if the quantity of each type of atom in the reaction is the same on both the reactant and product sides. In a balanced chemical equation, the mass and the change are both equal.
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What is the structure for 5-hydroxy-2-phenyl-3-hexanone?
5-hydroxy-2-phenyl-3-hexanone structure is a molecule made up of three functional groups: a phenyl group, a hydroxy group, and a hexanone group.
The phenyl group is a six-carbon ring with alternating single and double bonds. It is attached to the carbon atom in the 2-position of the molecule. The structure for 5-hydroxy-2-phenyl-3-hexanone is a molecule with a phenyl group (-C6H5) attached to the carbon atom in the 2-position, a hydroxy group (-OH) attached to the structure carbon atom in the 5-position, and a hexanone group (-C6H12O) attached to the carbon atom structure in the Reference image is provided below.
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Classify substances using their chemical formula and properties
pure substances and mixtures.
What are the chemical characteristics?Some of the most important chemical qualities include flammability, toxicity, heat of combustion, pH value, radioactive decay rate, and chemical stability.
Pure substances and mixes are the two major kinds of matter. A pure material is a type of stuff that has a consistent composition and characteristics throughout the sample. Physical combinations of two or more elements and/or compounds are known as mixtures.
Gold, copper, oxygen, chlorine, and diamond are just a few examples. Pure substances include compounds such as water, salt or crystals, baking soda, and others. Flammability is connected to the compound’s ability to burn.
Solubility is the ability of one substance to dissolve in another.
Temperature: This refers to how hot or cold something is.
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two isotopes of uranium, 238u and 235u, have the same number of ___, but different numbers of ___.
Answer:
Two isotopes of uranium, 238U and 235U, have the same number of atomic number , but different numbers of relative atomic mass.
One way to remove lead ions from water is to precipitate it out. Lead (II) chloride reacts with potassium iodide to produce lead (II) iodide (the precipitate) and potassium chloride. Write a balanced chemical equation for this double replacement reaction.
The balanced chemical equation of reaction of lead chloride with potassium iodide is written as follows:
[tex]\rm PbCl_{2 } + 2 KI \rightarrow PbI_{2} + 2 KCl[/tex]
What is displacement reaction ?In a displacement reaction, one or two element or group is displaced from the reactants by other. There are both single displacement and double displacement reactions.
In single displacement reactions, one one element or group is displaced from a reactant by other element. In double displacement, two groups are displaced between two reactants.
The reaction between lead chloride and potassium iodide as written in the above reaction gives lead iodide and potassium chloride. Where the Cl and I atoms are displaced.
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A chemist mixes solid AgCl, CuCl2, and MgCl2, in enough water to give a final volume of 50.0 mL.
(a) With ions shown as spheres and solvent molecules omitted for clarity, which of the following best
represents the resulting mixture?
(b) If each sphere represents 5.5*10^-3 mol of ions, what is the total concentration of dissolved (separated) ions?
(c) What is the total mass of the solid?
a- With ions shown as spheres and solvent molecules omitted for clarity, AgCLof the following best represents the resulting mixture.b- If each sphere represents 5.5*10^-3 mol of ions, the total concentration of dissolved (separated) ions 0.11 M (molar) and total mass of solid is 32,.61.
a) The resulting mixture of AgCl, CuCl2, and MgCl2 would be a homogeneous solution. All three of these compounds are ionic compounds and when dissolved in water, they will dissociate into their respective cations (Ag+, Cu2+, and Mg2+) and anions (Cl-). These ions will be surrounded by solvent molecules (water) and will be evenly distributed throughout the solution, resulting in a homogeneous mixture.
b) The total concentration of dissolved ions in the solution can be calculated by using the formula:concentration (mol/L) = moles of solute / liters of solvent. If each sphere represents 5.5*10^-3 mol of ions, and the final volume of the solution is 50.0 mL, we can convert the volume to liters and calculate the concentration of ions as follows: 50.0 mL = 0.05 L. Concentration = (5.5*10^-3 mol) / 0.05 L = 0.11 M (molar)
c) To find the total mass of the solid, we need to know the molar mass of each component. AgCl: Ag = 107.87g/mol, Cl = 35.45g/mol, AgCl = 143.32g/mol
CuCl2: Cu = 63.55g/mol, Cl = 35.45g/mol, CuCl2 = 99.00g/mol
MgCl2: Mg = 24.30g/mol, Cl = 35.45g/mol, MgCl2 = 59.75g/mol. Let's assume we have 0.1 mol of AgCl, 0.1 mol of CuCl2 and 0.1 mol of MgCl2, the total mass of the solid would be:
143.32g/mol * 0.1mol + 99.00g/mol * 0.1mol + 59.75g/mol * 0.1mol = 16.73 + 9.90 + 5.98 = 32.61g
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4NaCI+2SO2+_H2O+_O2->_Na2SO4+4HCI which numbers balance this equation
Answer:
2,1,2
Explanation:
4Na=2(Na2So4)
4HCl= 2(H2O)
Right side 8 O so 1(O2)
