Question

Ammonia gas occupies a volume of 450 mL at a pressure of 720 mm of Hg. What volume will it occupy
at standard pressure at the same temperature?
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Answer 1

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Answer 2

Given - Original pressure and volume

Find - Volume at standard pressure

Solution - The formula to be used here is -

P1V1 = P2V2

P1 = 720 mm of Hg

V1 = 450 ml

P2 = 760 mm of Hg

Keep the values in formula to find the value of V2

$V2 = \frac{720 \times 450}{760}$

Performing multiplication and division

$V2 = 426.3 \: ml$

Hence, the volume at standard pressure is 426.3 ml.