Equal amounts of marble chips are reacted separately with 100cm³ of hydrochloric acid of different concentrations. If all the marble chips reacted; which of the following remained the same in each case?

A. Average rate of evolution of gas
B. Total mass of gas evolved during the reaction
C. Time taken for the reaction to reach completion
D. Initial reaction rates

Correct Answer: Option B

B. Total mass of gas evolved during the reaction