The molecular weight of a gas that has a density of 7.10 g/L at 25.0°C and 1.00 atm pressure is __________ g/mol.

Question

Quizplus · Accepted Answer

Using the ideal gas law, PV = nRT, and the relationship between moles and molecular weight, we can calculate the molecular weight (M) using the formula M = (dRT)/P, where d is the density, R is the ideal gas constant (0.0821 L·atm/mol·K), T is the temperature in Kelvin (298 K), and P is the pressure (1 atm). Substituting the given values, M = (7.10 g/L * 0.0821 L·atm/mol·K * 298 K) / 1 atm = 174 g/mol.

The Molecular Weight of a Gas That Has a Density