Determine the volume in which chlorine will take a) weighing 4.2 grams, b) the amount of substance is 2 mol

Given:

m (Cl2) = 4.2 g;

n (Cl2) = 2 mol.

V -?

Solution:

The chlorine volume is determined by the formula:

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

A). The amount of chlorine is unknown.

Find by the formula:

n = m: M, where M is the molar mass of chlorine.

M (Cl2) = 35 g / mol × 2 = 70 g / mol.

n = 4.2 g: 70 g / mol = 0.06 mol.

V = 22.4 L / mol × 0.06 mol = 1.344 L.

B).

V = 22.4 L / mol × 2 mol = 44.8 L.

Answer: a) 1.344 l; b) 44.8 liters;.