Question

A sample of Ne gas has a pressure of 654 mmHg with an unknown volume. The gas has a pressure of 345 mmHg when the volume is 495 mL, with no change in temperature or amount of gas. What was the initial volume, in milliliters, of the gas?

Short answer

The initial volume of the gas was$261ml$.

Step-by-step solution

Given information

We need to find the initial volume of the gas in millilitres.

Explanaiton

As the temperature is not changing so we can apply Boyle's law

$P1V1=P2V2$

Now,

localid="1653571918071" $P1=654mmHg$

localid="1653571910388" $P2=345mmHg$

localid="1653571945933" $V2=495ml$

Substituting the given values we get,

localid="1653571937937" role="math" $V1=\frac{345mmHg\times 495ml}{654mmHg}=261ml$

So the initial value of gas was$261ml$