Oxygen (molar mass = 32 g) occupies a volume of 12 liters when its temperature is 20$\degree$C and its pressure is 1 atm. Using R = 0.082 liter . atm/mole. K, calculate the mass of the oxygen:

Question

Quizplus · Accepted Answer

Using the ideal gas law, PV = nRT, we can calculate the number of moles of oxygen present:

n = (PV) / (RT)
n = (1 atm * 12 L) / (0.082 (L*atm/mol*K) * (20 + 273.15 K))
n = 0.484 moles

To calculate the mass of oxygen, we can use the molar mass:

mass = n * molar mass
mass = 0.484 moles * 32 g/mol
mass = 15.488 g

Therefore, the closest answer choice is C) 16 g.

Oxygen (Molar Mass = 32 G) Occupies a Volume of 12