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General Chemistry

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Reaction between Zinc-Copper Alloy and Dilute Sulfuric Acid

CHEM-IMNJG9

A sample of pulverized Zn-Cu alloy (100.00 g) was put in an excess amount of dilute sulfuric acid. After the reaction was complete, 22.4 L gas was produced and collected at $25.0\space { }^{ o }C$ and 1.00 atm. The atomic masses of Zn and Cu are 65.38 and 63.55, respectively.

What is the percentage of copper in the said alloy sample?

A

49.29%

B

34.62%

C

65.38%

D

63.55%