Hydrogen gas is produced when zinc reacts with hydrochloric acid. If the actual yield of this reaction is 85%, how many grams of zinc are needed to produce 112 L of H2 at STP?
Zn(s) + 2HCl(aq) -> ZnCl2 (s) + H2 (g)a. 95 g
b. 180 g
c. 280 g
d. 380 g
Answer: D