[misS aPple]

[14] A sample of hydrogen gas was collected over water at 21C and 685 mmHg. The volume of the container was 7.80 L. Calculate the mass of H2 (g) collected. (Vapor pressure of water = 18.6 mmHg at 21C.)

A. 1.689 g
B. 0.283 g
C. 0.571 g
D. 7.14 g


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