# What is the mass of a gas that occupies 48.9 liters, has a pressure of 724 torr, a temperature of 25°,C and a molecular weight of 345 g?

##### 1 Answer

May 24, 2014

For this question, we're going to start with the Ideal Gas Law

We know

Solving this for

Looking up the value for R with our units, gives us a value of 62.36367.

Plug in our numbers (Remember to convert Celsius to Kelvin and solve to get an answer of approximately 657g.