Question

which of the following statements is true about excess reactants? a. they are always used up completely in a reaction b. they are present in greater quantities than needed to completely react with the limiting reactant c. they limit the amount of product that can be formed d. they are always gases

Explanation:

An excess reactant is present in a chemical - reaction in a greater amount than is required to react completely with the limiting reactant. The limiting reactant is the one that gets used up completely and determines the amount of product formed. Excess reactants are not always gases and are not used up completely in a reaction.

Answer:

B. They are present in greater quantities than needed to completely react with the limiting reactant