In the Laboratory,hydrogen Gas Is Usually Made by the Following

question 117

Multiple Choice

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 21.0°C,can be made from 2.566 g of Zn and excess HCl? The partial pressure of water vapor is 18.65 mm Hg at 21.0°C.

• A)0.0701 L
• B)0.939 L
• C)0.959 L
• D)0.981 L

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