A 24.0-L tank contains ideal helium gas at 27°C and a pressure of 22.0 atm.How many moles of gas are in the tank? (R = 8.31 J/mol ∙ K,1 atm = 101 kPa)
A)238 mol
B)138 mol
C)17.5 mol
D)21.4 mol
E)76.0 mol

Question

Quizplus · Accepted Answer

First, we need to convert the temperature to Kelvin:

27°C + 273 = 300 K

Next, we can use the ideal gas law to solve for the number of moles:

PV = nRT

n = PV/RT

n = (22.0 atm)(101 kPa/atm)(24.0 L)/(8.31 J/mol*K)(300 K)

n ≈ 21.4 mol

Therefore, the answer is D, 21.4 mol.

A 240-L Tank Contains Ideal Helium Gas at 27°C and a a Pressure