# How to Calculate Partial Pressure in a Gas Mixture

## What is the partial pressure of ammonia in a gas mixture?

A scientist is examining a mixture of nitrogen, hydrogen, and ammonia. The individual pressures exerted by nitrogen and hydrogen are 0.26 atm and 0.28 atm, respectively. If the total pressure is 0.90 atm, what is the partial pressure of ammonia? Use mc016-1.jpg.

a) 0.27 atm

b) 0.36 atm

c) 0.54 atm

d) 0.90 atm

## Answer:

Partial pressure of ammonia gas will be 0.36 atm.

When dealing with a gas mixture and calculating partial pressures, it is important to consider the individual pressures exerted by each gas component and the total pressure of the mixture. In this case, we are given the partial pressures of nitrogen and hydrogen as 0.26 atm and 0.28 atm respectively, and the total pressure of the mixture as 0.90 atm.

To find the partial pressure of ammonia, we can use the formula:

Partial Pressure of Ammonia = Total Pressure - (Partial Pressure of Nitrogen + Partial Pressure of Hydrogen)

Substitute the given values into the formula:

0.90 atm - (0.26 atm + 0.28 atm) = 0.36 atm

Therefore, the partial pressure of ammonia in the gas mixture is 0.36 atm.