# A container has a volume of #9 L# and holds #18 mol# of gas. If the container is expanded such that its new volume is #54 L#, how many moles of gas must be injected into the container to maintain a constant temperature and pressure?

##### 1 Answer

Nov 18, 2016

The answer is

#### Explanation:

Let's work with the ideal gas equation

With the initial conditions,

With the final conditions,

as the temperature and the pressure do not change,

From those 2 equations,

Number of moles of gas to be injected