Question

Partial pressure of nitrogen gas (N₂) in the atmosphere will be:

• A. ∼ 7808 Pa
• B. ∼ 0.7808 Pa
• C. ∼ 7.9 × $10^4$ Pa
• D. ∼ 0.79 × $10^4$ Pa

Hint:

The total atmospheric pressure is distributed proportionally among all gases. Multiply the atmospheric pressure by the percentage composition of the gas.

Answer 1

The Correct Option is C

1. The approximate total atmospheric pressure is \( 1 \, \text{atm} = 101325 \, \text{Pa} \).
2. Nitrogen gas (\( N_2 \)) constitutes approximately \( 78\% \) of the atmosphere.
3. Nitrogen's partial pressure is: \[ P_{N_2} = 0.78 \times 101325 \approx 7.9 \times 10^4 \, \text{Pa}. \]