How many grams of zinc metal are required to produce 1.00 liter of hydrogen gas at STP according to the chemical equation shown below?

Question

Quizplus · Accepted Answer

According to the chemical equation shown below, 1 mole of zinc produces 1 mole of hydrogen. At STP, 1 mole of any ideal gas occupies 22.4 L.
Zn + 2HCl → ZnCl2 + H2
1 mole of H2 gas at STP occupies 22.4 L
1 liter of H2 gas at STP = 0.0446 mol
So, to produce 1 liter of H2 gas at STP, 0.0446 mol of zinc is required.
The molar mass of zinc is 65.4 g/mol
Therefore, mass of zinc required = 0.0446 x 65.4 = 2.92 g.

How Many Grams of Zinc Metal Are Required to Produce