Question 1
When 14.0 g of zinc metal reacts with excess HCl, how many litres of H
2 gas are produced at STP?
◦ 0.208 L
◦ 0.416 L
◦ 9.60 L
◦ 4.86 L
Question 2
How many grams of zinc metal are required to produce 2.00 L of hydrogen gas at STP according to the chemical equation shown below?
Zn(
s) + 2HCl(
aq) → ZnCl
2(
aq) + H
2(
g)
◦ 0.171 g
◦ 131 g
◦ 5.76 g
◦ 11.7 g