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- 1. Multiple Choice
In the reaction pictured, how many moles of hydrogen will be formed when 4 mol of HCl are consumed?
6
4
2
8
- 2. Multiple Choice
For the reaction pictured how many moles of nitrogen gas (N2) are required to produce 18 mol of ammonia (NH3)?
18
9.0
4.5
36
- 3. Multiple Choice
What mass of NaCl can be produced from 0.75 mol of chlorine gas (Cl2)?
0.75 g
1.5 g
44 g
88 g
- 4. Multiple Choice
What mass of carbon dioxide (CO2) can be produced from 25.0 g of calcium carbonate (CaCO3)?
25.0 g
11.0 g
22.0 g
56.0 g
- 5. Multiple Choice
If given the mass of methane (CH4) what can be calculated based on the balanced reaction below?
The mass of the oxygen gas reacting along with the mass of carbon dioxide and water produced.
Only the mass of carbon dioxide produced.
Only the mass of oxygen gas reacting.
Only the mass of ,carbon dioxide and water produced.
- 6. Multiple Choice
What is the correct ratio of nitrogen gas to lithium in the reaction pictured?
- 7. Multiple Choice
In stoichiometry, chemists are mainly concerned with
mole and mass relationships in chemical reactions.
the types of bonds found in compounds.
energy relationships in chemical reactions.
the speed with which chemical reactions occur.
- 8. Multiple Choice
If a chemical reaction involving substance A and B stops when substance B is completely used up, then substance B is referred to as the
excess reactant.
limiting reactant.
primary reactant.
primary product.
- 9. Multiple Choice
In most chemical reactions the amount of product obtained is
more than the theoretical yield.
equal to the theoretical yield.
more than the percent yield.
less than the theoretical yield.
- 10. Multiple Choice
After a reaction is complete you still have some of one of the reactants left unreacted. That reactant is know as
primary reactant.
excess reactant.
limiting reactant.
primary product.
- 11. Multiple Choice
The coefficients in a chemical equation represent which type of ratio?
mass to mass ratio
mole to mole ratio
mass to mole ratio
mole to mass ratio
- 12. Multiple Choice
If % yield is 100% then which of the following is true?
actual yield is greater than theocratical yield
actual yield is less than theocratical yield
actual yield is equal to theocratical yield
there is no limiting reactant
- 13. Multiple Choice
Which of the following would be investigated in reaction stoichiometry?
the types of bonds that break and form when acids reacts with metals
the mass of potassium required to produce a known mass of potassium chloride
the amount of energy released in chemical reactions
the mass of hydrogen and oxygen in water
- 14. Multiple Choice
Which of the following cannot be determined from the pictured equation?
Moles of a product produced from a given amount of reactant.
Mass of a product produced from a given amount of reactant.
Number of atoms or molecules produced from a given amount of reactant.
The volume of a liquid produced from a given amount of reactant
- 15. Multiple Choice
Given the pictured equation, how may moles of hydrogen gas (H2) would be produced from 1.00 mole of Zinc (Zn) if there was a 85.0% yield?
.850 mole
.750 mole
1.00 mole
There is no way to determine this answer.
- 16. Multiple Choice
Given the pictured equation, what is the ratio of Zn to HCl needed to completely react all reactants
1 L Zn to 2 L HCl
1 mole Zn to 2 mole HCl
1 g Zn to 2 g HCl
There is no way to determine this answer.
- 17. Multiple Choice
#1 only
#2 only
#3 only
#2 and #3 only
- 18. Multiple Choice
Which is true of the reaction shown below?
Two molecules of Substance Y will be left over when this reaction goes to completion.
Substance Y is the limiting reagent in this reaction.
The addition of more molecules of Substance X will not affect the amount of Substance Z that can be made.
The mole ratio of this reaction is 6:5:6.
- 19. Multiple Choice
1 : 1
2 : 3
1 : 3
1 : 2
- 20. Multiple Choice
2 : 3
1 : 2
1 : 1
1 : 3
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