Question

A sample of hydrogen gas was collected over water at 21oC 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 21oC.)

Answer 1

Answer:

Question: a sample of hydrogen has was collected over water at 21 C and 685 mmHg. the volume of the container was 7.80 L. ... (Vapor pressure of water = 18.6 mmHg at 21 C) answer is . 572 g.

Explanation:

this is the answer.

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Answer 2

The volume of the container was 0.5666g.

Explanation:

$=(685-18.6)$

$=66.4 mm$ of $Hg$

$=\frac{666.4}{760}$

$=0.8768etm$

$0.08768*7.8=n*0.082*294$

$pv=nRT$

$n=\frac{0.8768*78}{0.0821*294}$

$=0.2833*2$

$=0.5666g$.