Hydrogen Gas Produced in the Laboratory by the Reaction of Zinc

question 95

Multiple Choice

Hydrogen gas produced in the laboratory by the reaction of zinc and hydrochloric acid was collected over water at 25°C.The barometric pressure at the time was 742.5 mm Hg.What is the pressure of dry hydrogen gas if the vapor pressure of water at 25°C is 23.8 mm Hg?

• A)742.5 mm Hg
• B)718.7 mm Hg
• C)766.3 mm Hg
• D)760.0 mm Hg
• E)none of the above

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Definitions:

Protein

Large biomolecules or macromolecules that are made up of one or more chains of amino acid residues.

Ala-Gly-Lys

A tripeptide composed of alanine, glycine, and lysine amino acids, often referenced in discussions of protein structure and function.

Alanine

A nonessential amino acid that plays a crucial role in glucose metabolism and immune system function.

Glycine

The simplest amino acid in living organisms, involved in the synthesis of proteins, without a chiral center, and serving as a neurotransmitter.