Question

A chemistry student found the density of Freon-11 (CFCl3) to be 5.58 g/L under her experimental conditions. Her measurements showed that the density of an unknown gas was 4.38 g/L under the same conditions. What is the molar mass of the unknown?

Answer 1

The molar mass of the unknown gas is approximately 98.112 g/mol.

Step-by-step explanation:

To find the molar mass of the unknown gas, we can use the formula for density:

Density = mass/volume

For the known gas, Freon-11 (CFCl3), the density is 5.58 g/L. For the unknown gas, the density is 4.38 g/L.

Let's assume we have 1 mole of the unknown gas. The molar mass can be calculated using the formula:

Molar mass = (mass/volume) x molar volume

Substituting the given values:

Molar mass = (4.38 g/L) x (22.4 L/mol) = 98.112 g/mol

Therefore, the molar mass of the unknown gas is approximately 98.112 g/mol.