Question

A sample of unknown gas weighs 2.25 g and occupies 850 mL at 790 mmHg and 70 ∘C . Part A What is the molar mass of the unknown gas?

Answer 1

The molar mass of the unknown gas is 39.9 g/mol.

Step-by-step explanation:

To determine the molar mass of the unknown gas, we can use the formula:

Molar mass (g/mol) = (density (g/L) * 22.4 L/mol)

Given that the density of the gas is 1.783 g/L at STP, we can calculate the molar mass as:

Molar mass = (1.783 g/L * 22.4 L/mol) = 39.9 g/mol

Therefore, the molar mass of the unknown gas is 39.9 g/mol.