# A container has a volume of #6 L# and holds #1 mol# of gas. If the container is expanded such that its new volume is #9 L#, how many moles of gas must be injected into the container to maintain a constant temperature and pressure?

##### 1 Answer

Nov 13, 2017

This is based on the Gas Law PV=nRT

#### Explanation:

P = pressure, V = volume, n = #moles of gas, R = universal gas constant 8.31 J/mol, T = temp

So,

Then, when the volume is expanded, 'n' will increase to keep P and T equal:

The ratio