Question

How many grams of the excess reactant are left after the reaction is complete?

a) None; all reactants are completely consumed.
b) The molar ratio of reactants determines the answer.
c) Excess reactant grams depend on reaction conditions.
d) It varies based on the specific reaction.

Answer 1

The excess reactant left after a reaction depends on the reaction conditions and can be calculated by subtracting the amount of excess reactant consumed from the total amount given.

Step-by-step explanation:

In a chemical reaction, the reactant that is completely used up and determines the amount of product formed is called the limiting reactant. The reactant that remains after the reaction is completed is called the excess reactant. The amount of excess reactant left over depends on the reaction conditions and can be calculated by subtracting the amount of excess reactant consumed from the total amount given.