What volume do they take: a) 0.2 mol of oxygen b) 3 mol of nitrogen c) 8.8 g of carbon dioxide d) 560 g of nitrogen

univerkov | August 16, 2021 | education

V = Vn n, where Vn is the molar volume of gas, equal to 22.4 l / mol, and n is the amount of substance.

V (O2) = 22.4 L / mol × 0.2 mol = 4.48 L.

V (N2) = 22.4 L / mol × 3 mol = 67.2 L.

To find the volume of substances through the mass, you need to find the amount of the substance. The amount of a substance is determined by the formula:

n = m: M, where M is molar mass.

M (CO2) = 12 + 16 × 2 = 44 g / mol.

n = 8.8 g: 44 g / mol = 0.2 mol.

V (CO2) = 0.2 mol × 22.4 L / mol = 4.48 L.

M (N2) = 14 × 2 = 28 g / mol.

n = 560 g: 28 g / mol = 20 mol.

V (N2) = 22.4 L / mol × 20 mol = 448 L.

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