0.2500 g of zinc reacts with 50.00 mL of 0.1000 M hydrochloric acid to yield hydrogen gas. (a) Identify the limiting reagent and calculate the theoretical yield of hydrogen gas in mols. (b) If the hydrogen produced in (a) is collected over water, calculate the total volume of hydrogen gas which would be collected at 760 mm Hg and 25 degrees celsius. (Hint: Will a second gas be present in the sample collected by water displacement?)