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# Boyles Law equation help!?

The problem reads: The volume of a given mass of a gas is 200ml at 76cmHg. If the volume is changed to 100ml at a constant temperature, what is the pressure of the gas?

Please help and thanks for you time!!!:D

### 2 Answers

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- 9 years agoFavorite Answer
The Boyles Law equation is pV = k where,

P = pressure

V = volume

k = constant value of the pressure and volume of the system.

Since we have two Volumes, k is the same, and only one pressure, we only need to solve for one pressure.

p1v1=p2v2

p1 = 76cmHg p2 = x

V1 = 200ml V2 = 100ml

Just rearrange this finding p2 or your new pressure and there is your answer.

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