Chemistry Help

these 2 Q 

1- Nitric acid, a very important industrial chemical, is made by dissolving the gas nitrogen dioxide (NO2) in water. Calculate the moles of gas produced in 2 L volume container, 743 torr and 50 ºC if the gas behaves as ideal

2- An unknown amouont 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 171-mL of salt water was collected in the beaker at 23C and 765mmHg, how many grams of sodium bicarbonate did one begin with?