The density of a gas in terms of carbon monoxide CO is 1.12. What is the mass of 10.5 liters of this gas?

1. Find the relative molecular weight of the gas:
M (gas) = DCO (gas) * M (CO);
M (CO) = 12 + 16 = 28 g / mol;
M (gas) = 1.12 * 28 = 31.36 g / mol;
2. find the chemical amount of the unknown gas:
n (gas) = V (gas): Vm;
n (gas) = 10.5: 22.4 = 0.4688 mol
3.Knowing the chemical amount and molecular weight, we find the mass of the gas:
m (gas) = n (gas) * M (gas) = 0.4688 * 31.36 = 14.7 g.
Answer: 14.7 g.