# The composition of earths dry atmosphere is #78.8% N_2#, #21.0% O_2#, and #1.00% Ar#. Using the atospheric pressure recorded, which was 763 mm Hg with and an ambient temperature of 25 C, how do you calculate the partial pressures of these three gases?

##### 1 Answer

Aug 14, 2016

#### Answer:

The partial pressure of each gas is simply the individual percentage of the measured pressure.

#### Explanation:

And thus

And

And the sum of the individual partial pressures is necessarily the overall pressure,