The final concentration of the resulting solution of NaOH after dilution to final volume of 2 litres is 0.025 M.
The concentration and volume of NaOH and concentration of resulting solution are related by the formula -
Initial concentration × initial volume = final concentration × final volume
Converting the final volume in milliliters
1 l = 1000 ml
2l = 2000 ml
Keep the values in formula -
1 × 50 = final concentration × 2000
Final concentration = 50/2000
Final concentration = 0.025 M
Thus, the final concentration of NaOH on dilution will be 0.025 M.
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If the surface area of reactants is larger Select one: a. the reaction rate is generally higher b. the reaction.rate is generally lower. c. the reaction rate is not affected d. the rate-determining step is eliminated.
The reaction rate is generally faster when the surface area of the reactants is larger, because more particles are exposed to the other reactant.
What are the factors that affect the rate of reaction?The reaction rate and otherwise rate of reaction is the rate at which a chemical reaction occurs, defined as proportional to the increase in product concentration per unit time and the decrease in reactant concentration per unit time.The reaction rate is influenced by the four main factors that influence the reaction rate are reactant concentration, physical state of the reactants, surface area, temperature, and the presence of a catalyst.The increased surface area of a reactant exposes more particles to the other reactant. There is a greater likelihood of particles colliding, resulting in more successful collisions per second. The rate of reaction quickens.To learn more about rate of reaction refer to :
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a cats heart can beat 220 times in 2minutes nearly twice as fast as a human heart. Assume the number of heartbeats y is the proportional to the number of minutes x. Write and solve an equation to determine how many times a cats heart beats in 5minutes
The heart beat fo the cat in 5 minutes if the cats heart can beat 220 times in 2minutes is 550 minutes.
How to illustrate the equation?An equation simply has to do with the statement that illustrates the variables given. In this case, it is vital to note that two or more components are considered in order to be able to describe the scenario.
Since the cats heart can beat 220 times in 2minutes nearly twice as fast as a human heart. The heart beat in 5 minutes will be:
= 220 / 2 × 5
= 550 minutes
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Dry ice in an ice-cream cart disappears. O melting O freezing O sublimation O condensation
Dry ice in an ice-cream cart disappears on sublimation .
In general , because of the process of absorption of heat , dry ice when present in the solid state is directly transformed directly into a gas without being converted into a liquid state and thus disappears. Dry ice get physical transformation by the process of sublimation that is from solid to the gaseous state without melting into a liquid.
Hence , we can say that sublimation is a process that is used to explain about the process of snow and ice changing into water vapor (gas) in the air without melting into water. Dry ice is generally present in solid state, that get to sublimate, or turn to gas, at a chilly -78.5 °C.
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In the presence of 55.0 moles of oxygen how many moles of iron can be used to produce iron (III) oxide?
In the presence of 55.0 moles of oxygen, 73.3 moles of iron can be used to produce iron (III) oxide.
How to calculate moles using stoichiometry?Stoichiometry refers to the study and calculation of quantitative (measurable) relationships of the reactants and products in chemical reactions (chemical equations).
According to this question, iron reacts with oxygen gas to produce iron(III) oxide as follows:
4Fe + 3O₂ → 2Fe₂O₃
Based on the above equation, 4 moles of iron reacts with 3 moles of oxygen.
This means that if 55 moles of oxygen reacts, 55 × ⁴/3 = 73.3 moles of iron will also react.
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2. Most air masses form over polar of tropical regions.
True
False
3. Fronts usually have fair weather.
True
False
The statement most air masses form over the polar of tropical regions is false because polar air masses are generally formed over hot or warm regions (question 2), while the statement fronts usually have fair weather is false since they trigger precipitation, thunderstorms, and even tornadoes (question 3).
What is a weather air mass?An air mass is a term used in methodology in order to denote any mass of air that is uniform in regard to different variables associated with such conditions such as for example temperature and or humidity.
Moreover, a front is a mass of air that leads to a climatic process such as precipitation or even more strong phenomena.
Therefore, with this data, we can see that weather air masses are uniform in regard to temperature and also humidity and they are associated with the emergence of different climatologic phenomena.
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Use the template below to construct a MO diagram for the BeN molecule and use it to answer the following questions.
In a diagram like the one below, the N atom in BeN would be represented by Atom ___A or B
In the completed diagram for BeN, the number of electrons in bonding orbitals is: ___
in antibonding orbitals is: ___
What is the bond order? If a fraction is needed, use a decimal number.
BeN is _________paramagnetic or diamagnetic.
Atomic orbitals, which reflect the distribution of electrons over two or more atoms, are combined linearly to form molecular orbitals.
What is the magnetic makeup and bond order of the He2 molecule?The bond order of $ H 2 + $ is therefore $ 0.5 $. One unpaired electron can be seen in the antibonding orbital when looking at the electrical arrangement. Therefore, $He 2+$ is paramagnetic.He2+ molecule's MO diagram's computed bond order is 0.5.Thus, the proper sequence of stability is: "H 2gtH 2" and "He 2" are capitalized. Additionally, because the hydrogen molecule ion has only one electron and no electron-electron repulsion, "H 2" (plus) is a little bit more stable than "He 2" (plus). Due to its higher bond order (bond order = 1) than He2+ (bond order = 1/2), the He22+ ion is more stable.Orbitals of molecules. an orbital with a specific energy and form that covers a molecule and can only hold two paired electrons. a MO bond. a molecular orbital is created when wave functions are joined to one another, raising the electron density between the nuclei.
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What are 3 population trends of the world’s growth rat since 1960
Calculate the average atomic mass of iron: isotope: 54fe; 56fe; 57fe; 58fe mass (amu): 53. 940; 55. 935; 56. 935; 57. 933 abundance: 5. 82 %; 91. 66 %; 2. 19 %; 0. 33 %.
The average atomic mass of fe with 3 isotopes is 55.96u
Given, abundance of isotopes,
54Fe-5%
56Fe 90%
57Fe-5%
(Considering the 3rd isotope as "Fe)
Thus, Atomic mass of Fe = ?
Atomic mass - Σabudnance x Mass number 100
= 5x54+90x56+5×57 / 100
= 55.95
Atomic mass of Fe = 55.95
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The average atomic mass of iron with isotopes Fe⁵⁴, Fe⁵⁶ , Fe⁵⁷ , Fe⁵⁸ is 55.84 amu.
Given
Isotopes Fe⁵⁴ = 53.940 amu and 5.82%
Isotopes Fe⁵⁶ = 55.935 amu and 91.66 %
Isotopes Fe⁵⁷ = 56.935 amu and 2.19 %
Isotopes Fe⁵⁸ = 57.933 amu and 0.33%
Average mass = (% abundance x isotope mass I + % abundance x isotopes mass II )/ 100
Average mass = (53.940 x 5.82% + 55.935 x 91.66 % +56.935 x 2.19 % + 57.933 x 0.33% ) /100
Average mass = 55.84 amu
Hence, average atomic mass is based on the abundance of isotopes.
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The number of moles of AgCl(s) (silver chloride) formed when 0.40 mol of NaCl reacts with 0.60 mol of AgNO3 is
The number of moles of AgCl(s) formed is 0.80 mol.
The number of moles of AgCl(s) formed when 0.40 mol of NaCl reacts with 0.60 mol of AgNO3 is 0.80 mol. This is because the reaction between NaCl and AgNO3 is a 1:1 molar ratio, meaning that 0.40 mol of NaCl and 0.60 mol of AgNO3 will produce 0.80 mol of AgCl(s).
The balanced chemical equation for this reaction is:
NaCl + AgNO3 → AgCl + NaNO3
This means that for every mole of NaCl that reacts with AgNO3, one mole of AgCl is produced. Thus, if 0.40 mol of NaCl reacts with 0.60 mol of AgNO3, 0.80 mol of AgCl will be formed. This is because the reaction between NaCl and AgNO3 is a 1:1 molar ratio, meaning that 0.40 mol of NaCl and 0.60 mol of AgNO3 will produce 0.80 mol of AgCl(s).
The balanced chemical equation for this reaction is:
NaCl + AgNO3 → AgCl + NaNO3
This means that for every mole of NaCl that reacts with AgNO3, one mole of AgCl is produced. Thus, if 0.40 mol of NaCl reacts with 0.60 mol of AgNO3, 0.80 mol of AgCl will be formed.
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The mass of a proton is 1.67 × 10-27 kg. What is the mass of a proton in Gigagrams?
If the mass of proton is 1.67 × 10-27 kg, then the mass of proton is Gigagram is [tex]1.67X10^{-33} Gg.[/tex]
Proton is the sub-atomic particle which is present inside the nucleus of the atoms and they are positively charged. Neutrons which are negatively charged and positively charged protons are found in the nucleus of the atoms.
As per the given data in the question:
The mass of the proton is given as 1.67 × 10-27 kg.
For conversion to the gigagrams the following conversion factor is used,
1 Gg=[tex]10^{6}[/tex] kg.
Using the above conversion factor, the mass of proton in Gigagrams is given as [tex]1.67X10^{-33} Kg\\[/tex].
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In a new compound, it is found that the central carbon atom is sp2 hybridized. This implies that: 1. carbon has a tetrahedral electronic geometry. 2. carbon has four lone pairs of electrons. 3. carbon has four sigma bonds. 4. carbon is also involved in a pi bond. 5. carbon has four regions of high electron density
4) The central carbon atom of a new compound is found to be sp2 hybridized. This suggests that a pi bond also involves carbon.
The sp2 hybridized carbon atom forms a bond with?A carbon atom is sp2 hybridized when one s-orbital and two p orbitals bond together. Between the three atoms, there are two single bonds and one double bond.
Can sp2 make bonds with pi?One "extra" p orbital remains on the atomic center because only three of the four atomic orbitals are used to create the sp2 hybrid orbitals. To form a bond, this p orbital can overlap with other p orbitals nearby.
What has the central atom hybridized by sp2?The only possible molecular geometry for sp2 hybridized central atoms is trigonal planar. The shape is also trigonal planar if all of the bonds are in place. The shape becomes bent if there are only two bonds and one single pair of electrons holding a bond in place.
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how many protons (p) and neutrons (n) are in an atom of barium-130?
Answer:
56 protons and 74 neutrons
Explanation:
There are 56 protons and 74 neutrons in an atom of barium-130.
I am pretty sure it's correct, I checked it over a couple of times. If I'm wrong, feel free to correct me!
What is the name for CuPO₄ ?
Copper ( _ ) Phosphate
Answer:
Copper (IV) Phosphate.
Explanation:
Copper (IV) Phosphate is an inorganic compound consisting of copper in its +4 oxidation state and phosphate anions. It has the chemical formula CuPO₄ and is commonly used as a component in catalysts, pigments, and ceramic materials. The "IV" in its name refers to the oxidation state of copper, which is +4.
Which of the following is true of electrolytes? A) all electrolytes have water as a solvent B) all electrolytes contain cations and anions C) both (a) and (b) are true D) both (a) and (b) are false
Electrolytes have water as a solvent also electrolytes contain cations and anions. Hence, both (a) and (b) .
For an Electrolytes, water is considered as an most important solvent. Electrolytes like sodium, calcium, potassium, chlorine, phosphate, and magnesium is obtained from the food we consume and also from your drinking fluids. Electrolyte levels can vary from small or too high in your body. This is dependent upon the change in amount of water by the body.
Hence , an electrolyte is said to have equal numbers of positive and negative ions in solution. Thus ,after applying electric field , the positive ions present are generally move from the direction of the field and the negative ions move opposite the field.
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is cellulose polar or nonpolar?
Cellulose is a polymer of glucose which is polar as it has many exposed OH groups.
Cellulose has 5 OH groups. It is not soluble in water which is polar as the chain behaves as hydrophobic It is so long it makes a massive closed structure If the chain is cut into smaller chains it reacts extensively and is soluble in water which is polar. Cellulose chains can compromise more than 1000-2000 molecules.
Cellulose polymer is hydrophilic and tends to strongly interact with water. Water molecules interact easily with cellulose chains. At the cellulose chain interface, many hydrogen bonds are broken.
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How many individual atoms (hydrogen and oxygen atoms) are in ONE MOLECULE of water?
One water molecule (H2O) contained two hydrogens (H) atoms and one oxygen (O) atom (O). As a result, one molecule of water contains three atoms.
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Directions: For each of the following reactions:
1) Identify the type of reaction (Single Replacement, combination, double replacement, decomposition, or combustion)
2) Complete the reaction
3) Balance it
1) NaCl(aq) + AgNO3(aq) →
2) Fe(s) + CuSO4(aq) →
3) C4H10(g) + O2(g) →
4) Ba(NO3)2(aq) + Na2SO4 (aq) →
5) AgNO3(aq) + Li(s) →
6) LiBI(g) + Cu(s) →
1) NaCl(aq) + AgNO3(aq) → double displacement
2) Fe + CuSO4 (aq) → FeSO4 (aq) + Cu (s) The type of reaction is a displacement reaction.
3) C4H 10(g) +O2(g) → 4CO2(g) +5H 2O(g) - combustion reaction
4)Ba (NO3)2 + Na2SO4 → BaSO4 + 2NaNO3 -double replacement reaction
5) AgNO3 + Li = LiNO3 + Ag might be an ionic equation.- redox reaction
6) LiBr(aq) + Cu(s) = CuBr(s) + Li(s)- redox reaction (ionic equation)
2C2H2(g) + 5O2(g) → 4CO2(g) + 2H2O(g)
This is a balanced equation for the combustion of acetylene (C2H2). How many grams of acetylene(C2H2 ) are required to produce 1.0 moles of CO2?
10.0 grams
5.0 grams
0.20 grams
13.0 grams
Taking into account the reaction stoichiometry, a mass of 13 grams of C₂H₂ is required to produce 1.0 moles of CO₂.
Reaction stoichiometryIn first place, the balanced reaction is:
2 C₂H₂ + 5 O₂ → 4 CO₂ + 2 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound are part of the reaction:
C₂H₂: 2 molesO₂: 5 molesCO₂: 4 molesH₂O: 2 molesThe molar mass of the compounds is:
C₂H₂: 26 g/moleO₂: 32 g/moleCO₂: 44 g/moleH₂O: 18 g/moleBy reaction stoichiometry, the following mass quantities of each compound are part of the reaction:
C₂H₂: 2 moles ×26 g/mole= 52 gramsO₂: 5 moles ×32 g/mole= 160 gramsCO₂: 4 moles ×44 g/mole= 176 gramsH₂O: 2 moles ×18 g/mole= 36 gramsMass of acetylene requiredThe following rule of three can be applied: If by reaction stoichiometry 4 moles of CO₂ are formed from 52 grams of C₂H₂, 1 mole of CO₂ is formed from how much mass of C₂H₂?
mass of C₂H₂= (1 mole of CO₂×52 grams of C₂H₂)÷ 4 mole of CO₂
mass of C₂H₂= 13 grams
Finally, 13 grams of C₂H₂ is required.
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Are the O-N-O bond angles greater in the nitrite ion (NC2-) or the nitrate ion (NO3-)? Please select the answer that best explains your conclusion. a. Nitrite has the greater bond angle because a trigonal planar bond angle is greater than a tetrahedral bona angle. b. Nitrite has the greater bond angle because a linear bond angle is greater than a trigonal planar bond angle. c. Nitrate has the greater bond angle because nitrite's lone pairs take up more space than bonds. d. Nitrate has the greater bond angle because double bonds take up more space than single bonds.
Nitrate having a greater bond angle because double bonds take up more space than to the single bonds.
The O-N-O bond angles greater in the nitrite ion (NC₂⁻) or the nitrate ion (NO₃⁻) having a greater bond angle because double bonds take more space than to the single bonds.
Incase of NO₃ : Nitrogen having five valence electrons and oxygen having two valency whereas O- having one valency. N=O having 1bp and in N-O also having 1bp.
In nitrate, there is a single center atom that is encircled by the three oxygen atoms that have identical bonds to one another and are positioned at the triangle's angles in the same one-dimensional plane. In essence, nitrate contains no lone pairs and three electron domains. As a result, the NO₃⁻ molecule's are trigonal planar and slightly bent chemical shape. Bond angle is 120 degrees.
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At which of the following pH values does the amino acid have the best buffering capacity? The graph below is provided for ease of answering parts (d) and (e). It is a still image of the titration above. What is the pl (isoelectric point)? The graph below represents the titration of an amino acid with NaOH solution. View the titration and answer the questions below (parts a through e). At what pH is the average net charge - 1/2? Where does the amino acid have a net charge of-1? At what point has enough base been added to react with 1/2 of the NH3+ groups?
The pH values at which amino acid have the best buffering capacity are 2.34 and 9.69.
The largest buffering capabilities of monoamino monocarboxylic acids are found in the two pH ranges closest to their pK′ values. Buffer capacity refers to the ability of a solution to resist changes in pH which can be either absorbing or desorbing H+ and OH- ions. It is the moles of an acid or base required to change the pH of a solution by 1, divided by the pH change and the volume of buffer in liters. Buffer capacity is a unitless number. When an acid or base is added to a buffer system, the pH change can be small or large which depends on both the initial pH and the capacity of the buffer to resist change in pH. Hence, a buffer resists changes in pH due to the addition of an acid or base though consumption of the buffer.
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When an anion like F" gains an electron what element is its outer valence electron configuration
like?
Answer:
Ne, Neon
Explanation:
The Flourine Anion (F-) has one more electron (more negative) than nuetral Flourine.
The electrion configuration of neutral floruine is 1s2 2s2 2p5
If we add one more electron, to get anion fluorine (F-)
We get:
1s2 2s2 2p6 (giving us 10 electrons)
Which also matches the electron configuration of Neon, Ne
What is the hybridization state of the central atom in SO2, assuming you do not expand the octet on the central atom?
A) sp3
B) sp2
C) sp
D) spd
E) spd2
Answer:
B. sp2
Explanation:
We see that there is a pi bond between one of the Oxygens when we draw out the Lewis Structure.
pi bonds are every bond other than a single bond. So double and tripple bonds.
To easily understand this, we can write out "sppp" and cross off however many pi bonds (p) there are. In this example we only have 1 pi bond so the hybridization will be sp2.
What is one possible Lewis structure for C3NOH7?
There is no possible Lewis structure for C3NOH7.
What is a Lewis structure?
A Lewis structure, also known as a Lewis dot diagram, is a way to represent the bonding and non-bonding electrons in a molecule. It is named after Gilbert N. Lewis, who introduced it in 1916. A Lewis structure shows the chemical symbol of each atom in the molecule and the electrons that are involved in the chemical bonds. It is used to predict the molecular geometry, reactivity, and other chemical properties of a molecule.
C3NOH7 is a molecule that does not exist in nature, it is not a stable compound. Nitrogen is not a typical Lewis acid, and it is unlikely that it will form a Lewis structure with 7 hydroxyl groups. It is not possible to draw a Lewis structure for C3NOH7, as the molecule is not stable and it is not a valid chemical compound.
It is important to make sure that the chemical formula is correct and corresponds to a stable and well-characterized compound before attempting to draw a Lewis structure.
Hence, there is no possible way to draw a Lewis structure for C3NOH7.
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..
O :
|| ..
The H₃C - CH₂ - C - NH₂ is the possible Lewis structure for C3NOH7.
What is Lewis structure?
All valence electrons are represented structurally by Lewis structures, which are used for molecules and polyatomic ions. These structural formulas are also known as Lewis dot structures because valence electrons are frequently depicted as dots in mathematical representations of matter.
What is electron?
An electron can either be unattached to an atom or free. An electron is a subatomic particle that has a negative charge (not bound). An atom is made up of three different sorts of particles: protons, neutrons, and an electron that is connected to an atom. An atom's nucleus is made up of protons, neutrons, and electrons.
..
O :
|| ..
H₃C - CH₂ - C - NH₂
..
O :
|| ..
Therefore, H₃C - CH₂ - C - NH₂ is the possible Lewis structure for C3NOH7.
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During the reactions of ofglucose is to CO2 a. Glycolysis; oxidized b. Metabolism; reduced c. Glycolysis; reduced d. Catabolism; oxidized
During the reaction of glucose is to Co2, the glycolysis produces pyruvate, ATP, and NADH by oxidizing glucose. The answer is option (a).
In the process of the glycolysis reaction, the glucose is broke down into pyruvate and energy. a total of 2 ATP is derived in the process (Glucose + 2 NAD+ + 2 ADP + 2 Pi --> 2 Pyruvate + 2 NADH + 2 H+ + 2 ATP + 2 H2O). The hydroxyl groups allow for phosphorylation. The specific form of glucose used in glycolysis is glucose 6-phosphate. The glycolysis process involves the generation of two molecules of the reduced form of nicotinamide adenine dinucleotide (NADH).
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H2O has a Delta.Hvap = 40.7 kJ/mol. What is the quantity of heat that is released when 27.9 g of H2O condenses? Use q equals n delta H..
H2O has a Delta. Hvap = 40.7 kJ/mol. The quantity of heat that is released when 27.9 g of H2O condenses will be -63.1 kJ
Enthalpy of vaporization of water,
ΔHvap = 40.7 kJ/mol
Mass of water, m = 27.9 g
we have to find out that how much the amount of heat (Q) released
The reaction is:
H2O(g) ↔ H2O(l)
The amount of heat evolved during condensation which involves a phase transition from vapor to liquid is given as:
Q = n × Delta.Hvap
n = number of moles
Since this is a condensation process:
ΔHcond = -ΔHvap
Q =[tex]\frac{27.9}{18}[/tex] × ( - 40.7 kJ/mol)
Q = -63.1 kJ
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(ii) Name one nitrogen containing fertilizer that is always applied in agriculture, but can pollute water. (01 mark)
Answer:
alminum
Explanation:
beacause its amzing
How many of the six valence electrons in sulfur are used in bonds in sulfur tetrachloride and disulfur difluoride
For sulfur tetrachloride, all six of the valence electrons in sulfur are used in bonds.
In sulfur tetrachloride, the sulfur atom is bonded to four chlorine atoms, each chlorine atom having one lone pair of electrons and the sulfur atom having two lone pairs. For disulfur difluoride, four of the valence electrons in sulfur are used in bonds. In disulfur difluoride, the sulfur atom is bonded to two fluorine atoms, each fluorine atom having one lone pair of electrons and the sulfur atom having two lone pairs.Learn more about Valence electrons
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Use Table B in your Student Guide to answer the questions about ion concentrations.
A solution with a pH = 13 has approximately how many moles of OH– ions per liter?
How many moles of H+ would this same solution have per liter?
(Use the decimal form of your answer.)
A different solution with an H+ concentration of 1.0 × 10–4 would have a pH =
.
a) The hydroxide ion concentration is 10 M
b) The number of moles of the hydrogen ions is 1 * 10^- 13 moles
c) The pH of the solution is 4.
What is the pH?
We know that the pH of the solution has to do with the amount of the hydrogen ions that we have in a solution. Looking at the fact that the number of the hydrogen or the hydroxide ions that is in the solution is the basis that we can use to decide whether the solution can be said to be acidic or not.
a) If the pH has been given for the solution as 13 then
Hydrogen ion concentration = Antilog (-13) = 1 * 10^-13 M
It then follows that; [tex][OH^-] [H^+] = 1 * 10^-14[/tex]
Then [tex]OH^-[/tex] = 1 * 10^-14/1 * 10^-13 M
= 10 M
The number of moles per liter of the hydrogen ions would be;
Concentration * volume
= 1 * 10^-13 M * 1 L
= 1 * 10^-13 moles
If the hydrogen ion concentration is 1.0 × 10^–4 then the pH of the solution = - log( 1.0 × 10^–4)
= 4
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Answer:
Use Table B in your Student Guide to answer the questions about ion concentrations.
A solution with a pH = 13 has approximately how many moles of OH– ions per liter? ⇒ 0.1
How many moles of H+ would this same solution have per liter?
⇒ 0.0000000000001
(Use the decimal form of your answer.)
A different solution with an H+ concentration of 1.0 × 10–4 would have a pH = 4.
Explanation:
he is right on the last question but not the rest
7.0 mol AgNO3 reacts with 3.0 mol Zn in
a single replacement reaction.
2AgNO3 + Zn → 2Ag + Zn(NO3)2
How many moles of Zn(NO3)2 form
from 7.0 mol AgNO3?
[?] mol Zn(NO3)2
Round your answer to the tenths place.
Mole measure the number of elementary entities of a given substance that are present in a given sample. Therefore, 3.5mole of Zn(NO[tex]_3[/tex])[tex]_2[/tex] form 7.0 mol AgNO[tex]_3[/tex] is produced.
What is mole?The SI unit of amount of substance in chemistry is mole. The mole is used to measure the quantity or amount of substance. We know one mole of any element contains 6.022×10²³ atoms which is also called Avogadro number.
The balanced equation for 7.0 mol AgNO[tex]_3[/tex] reaction with 3.0 mol Zn in
a single replacement reaction is
2AgNO[tex]_3[/tex] + Zn → 2Ag + Zn(NO[tex]_3[/tex])[tex]_2[/tex]
moles of AgNO[tex]_3[/tex] = 7.0 mol
The mole ratio between AgNO[tex]_3[/tex] and Zn(NO[tex]_3[/tex])[tex]_2[/tex] is 2:1
from 2 moles of AgNO[tex]_3[/tex], 1 mole of Zn(NO[tex]_3[/tex])[tex]_2[/tex]
from 1 moles of AgNO[tex]_3[/tex], 1/2 mole of Zn(NO[tex]_3[/tex])[tex]_2[/tex]
from 7.0 moles of AgNO[tex]_3[/tex], (1/2)× 7.0=3.5mole of Zn(NO[tex]_3[/tex])[tex]_2[/tex]
Therefore, 3.5mole of Zn(NO[tex]_3[/tex])[tex]_2[/tex] form 7.0 mol AgNO[tex]_3[/tex] is produced.
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element x decays radioactively with a half life of 5 minutes. if there are 700 grams of element x, how long, to the nearest tenth of a minute, would it take the element to decay to 20 grams?
Element x decays radioactively with a half-life of 5 minutes. if there are 700 grams of element x then element X will take 25.6 min to decay 20 grams to the nearest tenth of a min.
Formula of decay
A(t) = A₀e⁻×t
For half-life A(t) = 1/2
placing this value in equation
x = ln2/5
Now putting A(t) = 20, A₀ = 700 and x = ln2/5 in decay formula.
t = 25.6
Half-life, in radioactivity, is the amount of time needed for half of a radioactive sample's atomic nuclei to decay (change spontaneously into other nuclear species by emitting particles and energy), or, alternatively, the amount of time needed for a radioactive material's rate of disintegrations per second to decrease by half.
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