# What is the pressure exerted by 32.00 g of Oxygen gas in a 20. L container at 30.00 C? Use R = 0.0821 L atm/mol k?

##### 3 Answers

#### Explanation:

First, let's determine the number of mole of oxygen gas.

Using

Then, let's convert the units of the given temperature to

Now, let's substitute all relevant values into the equation

Therefore, the pressure exerted by the oxygen gas is

#### Explanation:

Note: mols and moles are the same things; formatting issues prevent me from using the same word throughout the answer

We will use the ideal gas equation, which is as follows:

We are solving for

Now, we find the rest of the numbers to plug in

Now, we solve.

First by plugging in numbers:

=>

Which is the same as:

Liters, moles, and Kelvin cancel out, giving us:

Now we simplify to get our answer:

=>

=>

The pressure is 1.2 atm.

#### Explanation:

This is an **ideal gas law** problem. The equation is:

where

You have been given the mass of

You have been given temperature in degrees Celsius, but gas problems require the temperature to be in Kelvins. Convert

**Given/Known**

Rearrange the equation to isolate