# A container has a volume of #8 L# and holds #9 mol# of gas. If the container is expanded such that its new volume is #36 L#, how many moles of gas must be injected into the container to maintain a constant temperature and pressure?

##### 1 Answer

Aug 21, 2016

40.5 moles of gas must be injected into the container.

#### Explanation:

The answer can be calculated by using Avogadro's law:

The number 1 represents the initial conditions and the number 2 represents the final conditions.

Identify your known and unknown variables:

Rearrange the equation to solve for the final number of moles:

Plug in your given values to obtain the final number of moles: