Question

a gas mixture with a total pressure of 775 mmhg contains each of the following gases at the indicated partial pressures: 122 mmhg CO₂, 241 mmhg ar , and 169 mmhg O₂ . the mixture also contains helium gas. part a what is the partial pressure of the helium gas? express your answer in millimeters of mercury.

Answer 1

The partial pressure of helium gas in the mixture is 243 mmHg, calculated by subtracting the sum of the known partial pressures from the total pressure of the gas mixture.

Step-by-step explanation:

Calculating the Partial Pressure of Helium Gas

To find the partial pressure of helium gas in a mixture, we can use Dalton's Law of Partial Pressures. Dalton's Law states that the total pressure of a gas mixture is equal to the sum of the partial pressures of the individual gases. Given the total pressure of the mixture (775 mmHg) and the partial pressures of CO2 (122 mmHg), Ar (241 mmHg), and O2 (169 mmHg), we can calculate the partial pressure of helium by subtracting the sum of the known partial pressures from the total pressure.

Calculation:

Therefore, the partial pressure of helium in the mixture is 243 mmHg.