A sample of gas (1.3 mol)occupies ________ L at 22 °C and 4.0 atm.
A)0.079
B)0.59
C)7.9
D)13
E)0.032

Question

Quizplus · Accepted Answer

We can use the ideal gas law, which states that:

PV = nRT

where P is the pressure in atm, V is the volume in L, n is the number of moles, R is the gas constant (0.08206 L atm/(mol K)), and T is the temperature in K.

We need to first convert the temperature from Celsius to Kelvin:

T = 22°C + 273.15 = 295.15 K

Now we can plug in the values:

(4.0 atm) V = (1.3 mol)(0.08206 L atm/(mol K))(295.15 K)

Solving for V:

V = (1.3 mol)(0.08206 L atm/(mol K))(295.15 K)/(4.0 atm)

V = 7.9 L

Therefore, the answer is choice C) 7.9.

A Sample of Gas (1