A 20.0-L pressure vessel holds 2.00 mol of oxygen at 30°C.What is the pressure inside the vessel? (R = 8.31 J/mol ∙ K)
A)101 Pa
B)101 kPa
C)1.01 MPa
D)2.52 MPa
E)252 kPa

Question

Quizplus · Accepted Answer

The ideal gas law is PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature. We can rearrange this equation to solve for P: P = nRT/V. Plugging in the given values, we get P = (2.00 mol)(8.31 J/mol ∙ K)(303 K)/(20.0 L) = 252 kPa.

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