# A container has a volume of #8 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

Jun 2, 2016

#### Explanation:

The law of the perfect gasses says:

where

At the beginning

and we can divide the first for the second:

Only the quantities with index