Unit 9 Review - Stoichiometry

If a chemist calculates the maximum amount of product that could be obtained in a chemical reaction, he or she is calculating the

• theoretical yield
• mole ratio
• actual yield
• percentage yield

How many steps will it take to go from grams of A to grams of B?

• 1

• 2

• 3

• 4

What is the measured amount of a product obtained from a chemical reaction?

• mole ratio
• theoretical yield
• percentage yield
• actual yield

What is the mole ratio of F₂ to HF in the following chemical equation?  

F₂ + 2 HCl --> Cl₂ + 2 HF 

• 2:2

• 1:1

• 1:2

• 2:1

In the equation 2 Al₂O₃ --> 4 Al + 3 O₂, what is the mole ratio of aluminum, Al, to oxygen, O₂ ?

• 10:6

• 3:4

• 4:3

• 2:3

When does a chemical reaction stop?

• When the excess reagent is used up

• When the limiting reagent is used up

• Chemical reactions never stop

What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?

• Percent Yield

• Excess Yield

• Mole Ratio

What is an Excess Reagent?

• The product you make

• The reactant you run out of first

• The reactant you have left over

How many steps will it take to go from moles of B to grams of A?

• 1

• 2

• 3

• 4

What is a Limiting Reagent?

• The amount you end with

• What you run out of first

• What you have left over

• What you start with