The mass of 10 liters of gas is 21.4 g. Calculate its molar mass.

Given:
V (gas) = 10 l
m (gas) = 21.4 g

To find:
M (gas) -?

1) n (gas) = V / Vm = 10 / 22.4 = 0.45 mol;
2) M (gas) = m / n = 21.4 / 0.45 = 48 g / mol.

Answer: The molar mass of the gas is 48 g / mol.



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