Question

In the laboratory, hydrogen gas is usually made by the following reaction:
Zn(s) + 2 HCl(aq) -> H2(g) + ZnCl2(aq)
How many liters of H2 gas, collected over water at an atmospheric pressure of 752 mm Hg and a temperature of 21.0C, can be made from 1.566 g of Zn and excess HCl? The partial pressure of water vapor is 18.65 mm Hg at 21.0C.
A) 0.0428 L
B) 0.573 L
C) 0.585 L
D) 0.599 L

Answer

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