The number of moles of oxygen (O₂) that will combine with 0.05 mol of methane (CH₄) is 0.1 moles of oxygen.
What is the mole ratio of the reaction of oxygen with methane?The mole ratio of the reaction of oxygen with methane is determined from the equation of the reaction of oxygen with methane.
The equation of the reaction of oxygen and methane is given below as follows:
CH₄ + 2 O₂ ---> CO₂+ 2 H₂O
The mole ratio of the reaction of oxygen with methane is 2 : 1
Hence, 0.05 moles of methane will require 0.05 * 2 moles of oxygen
0.05 moles of methane will require 0.1 moles of oxygen.
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CobberNet What is the common name of the following CH3CH, CH2OCH3 Submit Answer Retry Entire Group
Organic molecule CH3CH(OH)CH2CH3 is the formula for the flavoring ingredient 2-Butanol, sometimes known as sec-butanol.
Sec-butanol is either polar or nonpolar?In contrast to sec-butanol, which has a significantly greater solubility, tert-butanol is miscible with water. Polar butanols, n-butanol, and isobutanol are very slightly soluble. While the longer hydrocarbon chain attenuates the polarity and decreases solubility, the hydroxyl group makes the molecule polar, which promotes solubility in water.Organic molecule CH3CH(OH)CH2CH3 is the formula for the flavoring ingredient 2-Butanol, sometimes known as sec-butanol. This secondary alcohol is combustible, colorless, soluble in 12 parts water, and totally miscible with polar organic solvents like ethers and other alcohols.Organic molecule CH3CH(OH)CH2CH3 is the formula for the flavoring ingredient 2-Butanol, sometimes known as sec-butanol.To learn more about Organic molecule refer to:
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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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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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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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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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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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label the functional groups in the molecule
The functional group in the molecule 3-iodo-2,2,4,4-tetramethylpentane is an alkyl halide, specifically an iodide (-I) group.
Regardless of the other atoms in the molecule, a functional group is a collection of atoms that have specific chemical characteristics. Covalent bonds bind the atoms in a functional group to the other molecules in the molecule as well as to one another. Functional groups connect to the nonpolar carbon atoms at the center of the repeating units of polymers, giving carbon chains a chemical identity. This functional group is formed by the replacement of a hydrogen atom in an alkane by a halogen atom. In this case, the halogen is iodine and the alkane is tetramethylpentane.
It is important to note that this compound doesn't have any other functional groups, it is only an alkyl halide.
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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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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?
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.
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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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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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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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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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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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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Does the amount of a substance lower the freezing point and increase the melting point?
Yes, the presence of a material can cause a pure solvent (like water) to have a lower freezing point and a higher melting point. Both freezing point depression and melting point elevation are terms used to describe this occurrence.
What are the freezing point?Liquid molecules are weakly bonded, and their intermolecular forces of attraction are weaker than those of solid molecules.
This is because the molecules' potential energy, which holds them together in the crystal lattice of a solid, is smaller than the heat energy that is delivered to them during the process of changing from a solid to a liquid state.
This potential energy serves as a proxy for the solid's lattice energy.
The molecules lose their kinetic energy and approach one another when the temperature of a substance is lowered through the removal of heat from the substance or a reduction in pressure.
They gradually build more potential energy and stabilize. They turn into solids at this point. It's one of the reliable
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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
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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A basic amino acid has an R group that contains
A) a methyl group
B) a thiol group
C) an amine group
d) a carboxyl group
A basic amino acid has an R group that contains ( D) a carboxyl group.
What is acid?Acid is a substance that has a pH level of lower than 7.0 and is capable of corroding or dissolving other substances. It is usually found in aqueous solutions and is a highly reactive substance. Examples of acid include sulfuric acid, hydrochloric acid, nitric acid and acetic acid. These are used in a variety of industries such as food production, industrial cleaning and chemical engineering. Acid is also used in the laboratory for titrations, pH testing and other experiments. Acids can be dangerous if mishandled and can cause skin, eye and respiratory irritation and even chemical burns.
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Decide which intermolecular forces act between the molecules of each compound in the table below.
intermolecular forces (check all that apply)
compound dispersion dipole hydrogen-bonding
hydrogen fluoride
I2
iodine
N2
nitrogen
oxygen difluoride
Intermolecular forces are forces of attraction between the different molecules of a compound.
Since hydrogen flouride, or HF, is a molar molecule, it exhibits both dipole-dipole and dispersion forces. Additionally, because fluoride has a higher electronegativity than hydrogen, hydrogen develops a partially positive charge that bonds with a lone pair of another fluorine ion to form what is known as hydrogen bonding. Therefore, it is safe to say that HF, or hydrogen fluoride, exhibits intermolecular forces like hydrogen bonding, dipole force, and dispersion force.
Iodine of I2 has a weak dispersion force and is non-polar by nature.
Since nitrogen, or N2, is a non-polar gas, its dispersion force is also relatively weak.
Oxygen difluoride, also known as OF2, is a polar molecule with a bent shape. As every molecule now has a dipole-dipole interaction, so does OF2. Additionally, every molecule with an electron has a dispersion force, so OF2 has both dipole and dispersion forces but no hydrogen bonds.
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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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Investigators have discovered a homemade bomb. What can they MOST likely assume about this bomb?
A.
B.
C.
D.
It uses low explosives.
It uses primary explosives.
It uses secondary explosives.
It uses high explosives.
To make homemade bomb, a creator van only use low explosives. Thus, option A is correct.
Where are homemade bombs used?An "homemade" bomb or other destructive device is used in a "improvised explosive device" (IED) attack to divert targets. Criminals, vandals, terrorists, bombers, and insurgents all utilize IEDs.
Typically, insurgent guerrillas or commando forces in a theatre of operations use IEDs in terrorist operations or in asymmetric unconventional warfare.
By the end of 2007, IEDs were thought to be responsible for about 63% of coalition fatalities in Iraq during the Iraq War (2003-2011), in which insurgents frequently used IEDs against American-led forces.
Hence homemade bombs are made using low explosives.
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Give the IUPAC name for the following compounds.
1,3-
ethyl
1,5-
methyl
2-
propyl
2,5-
cyclohexane
3-
decane
4-
heptane
7-
hexane
dimethyl
nonane
The IUPAC nomenclature is based on naming the longest continuous or ring-shaped chain of carbons joined by a single bond in a given molecule.
What IUPAC means?
International chemistry and allied disciplines and technologies are represented by the International Union of Pure and Applied Chemistry (IUPAC).
As proposed by the International Union of Pure and Applied Chemistry, the IUPAC nomenclature of organic chemistry is a system for naming chemical compounds that are organic (IUPAC). The Nomenclature of Organic Chemistry contains a publication of it (informally called the Blue Book).
A molecule's longest chain of carbons joined by a single bond, whether in a continuous chain or a ring, is used to name the molecule according to the IUPAC nomenclature system. According to a predetermined order of priority, prefixes or suffixes are used to identify any deviations, including those involving multiple bonds or atoms other than carbon and hydrogen.
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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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I need help please really quick
Answer: False
Explanation:
Atoms comprise a proton with electrons that can be bonded with a neutron. Isotopes change in atomic mass due to the increase or decrease in neutrons; since neutrons always bond with protons, the number of atoms stays the same.
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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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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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
