An unknown amount of sodium bicarbonate reacts with excess hydrochloric acid in a gas producing reaction. The?

An unknown amount of sodium bicarbonate reacts with excess hydrochloric acid in a gas producing reaction. The reaction vessel has the same set-up as that in lab. Paying attention to the partial pressures of water in your lab book, if 125-mL of salt water was collected in the beaker at 23C and 765mmHg, how many grams of sodium bicarbonate did one begin with?