Question

A 5.0 L vessel has a total pressure of 5.0 atm. The partial pressure of the gases in the
vessel are 1.2 atm N2, 2.0 atm F2, and 1.0 atm H2 at 273 K.
What is the partial pressure of the remaining gas that was not measured?
10.5 atm
0.5 atm
2.0 atm
0.8 atm

Answer 1

The partial pressure of the remaining gas that was not measured is 0.8 atm.

Partial pressure of gases

This is the individual pressure exacted by each gas in the containing vessel. This partial pressure of individual gases make up the total pressure.

Pt = P₁ + P₂ + P₃ + P₄

5 = 1.2 + 2 + 1 + P₄

5 = 4.2 + P₄

P₄ = 5 - 4.2

P₄ = 0.8 atm

Thus, the partial pressure of the remaining gas that was not measured is 0.8 atm.

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