Stoichiometry & Limiting Reactants - Chapter 9 Review

What is the maximum amount of product that can be formed between 2 or more reactants?

• Actual Yield

• Theoretical Yield

• Percent Yield

• Limiting Reactant

When two chemicals react, this is the actual amount of product that is produced.

• Actual Yield

• Theoretical Yield

• Percent Yield

• Limiting Reactant

This is how close you get to the theoretical yield when performing a reaction.

• Actual Yield

• Theoretical Yield

• Percent Yield

• Limiting Reactant

The balanced equation 4Fe + 3O₂ --> 2Fe₂O₃ tells us that 3 moles of O₂:

• react with 3 moles of Fe

• produce 2 moles of Fe₂O₃

• cannot react with Fe

• react with 1 mole of Fe

The balanced equation for the burning of butane is 2C₄H₁₀ + 13O₂ --> 8CO₂ + 10H₂O. How many grams of oxygen gas are required to react completely with 4.00 moles of butane (C₄H₁₀)?

• 832 grams O₂

• 1,660 grams O₂

• 128 grams O₂

• 64.0 grams O₂

In the equation 4Si₂H₃ + 11O₂ --> 8SiO₂ + 6H₂O, how many grams of SiO₂ will be produced when 4.00 moles of Si₂H₃ are reacted completely?

• 8.00 g SiO₂

• 6.00 g SiO₂

• 481 g SiO₂

• 0.133 g SiO₂

Which is true about the excess reactant in a reaction?

• It limits the amount of product that can be made.

• It is left over after the reaction.

• It is the theoretical maximum amount of product that can be produced.

• It completely runs out when the reaction is performed.

In this reaction, there are 25.0 grams of each reactant. what is the theoretical yield of manganese?

3MnO₂ + 4Al --> 3Mn + 2Al₂O₃

• 15.8 g Mn

• 38.2 g Mn

• 1370 g Mn

• 1030 g Mn

A reaction is done and 18.8 grams of CO₂ are produced. The chemist doing the experiment should have produced 29.3 grams of CO₂. What is the percent yield of carbon dioxide?

• 1.56%

• 156%

• 0.642%

• 64.2%

Which is true about the limiting reactant?

• It slows the reaction down.

• It is used up first.

• It is the reactant that is left over.

• It controls the speed of the reaction.