# A football has a diameter of 22 cm. It is inflated to 1 atm pressure above normal atmospheric pressure on a sunny summer day when the temperature was 25C. Take normal atmospheric pressure to be 101.3 kPa. What mass of air is contained in the ball?

##### 1 Answer

#### Answer:

See below. The answer is about

#### Explanation:

We are going to use the formula(the ideal gas law)

Then, what is the value of the variants?

[1]

(I interpreted "inflated to 1 atm pressure above normal atmospheric pressure" to be 2 atm. If this is wrong, let me know.)

[2]

[3]

Plug in these values to the formula.

The avarage molar mass of the air is