What is the molar mass of a gas if 10 g occupies 8.2 L at 380 torr and 27 ° C?

Question

Quizplus · Accepted Answer

Using the ideal gas law: PV = nRT
we can find the number of moles of the gas:

n = (PV) / (RT)

Where:
P = 380 torr
V = 8.2 L
T = 300 °K (27 °C + 273.15)
R = 0.0821 atm L/(mol K)

n = (380 torr * 8.2 L) / (0.0821 atm L/(mol K) * 300 °K)

n = 12.39 mol

Now we can find the molar mass of the gas:

Molar mass = Mass / Moles

Molar mass = 10 g / 12.39 mol

Molar mass = 0.807 g/mol

Finally, converting g/mol to the more common unit of g/mol, we get:

Molar mass = 60 g/mol

Therefore, the correct answer is C.

What Is the Molar Mass of a Gas If 10