At STP,what is the mass 13.0 L of methane,C ?

Question

At STP,what is the mass 13.0 L of methane,C  ?

Quizplus · Accepted Answer

To solve this problem we can use the ideal gas law: PV = nRT, where P is the pressure, V is the volume, n is the number of moles, R is the gas constant, and T is the temperature.

At STP, the pressure is 1 atm and the temperature is 273 K. We can use the molar mass of methane (16.04 g/mol) to convert from moles to grams:

n = V/Vm = 13.0 L / 22.4 L/mol = 0.580 mol
m = n x M = 0.580 mol x 16.04 g/mol = 9.31 g

Therefore, the answer is C) 9.31 g.

At STP,what Is the Mass 13