0.123 g of a gas occupy a volume of 124 mL at 120. °C and 760. torr. Its molar mass is ________.

Question

Quizplus · Accepted Answer

Using the ideal gas law, PV = nRT, we can calculate the molar mass. First, convert the volume to liters (0.124 L), temperature to Kelvin (393 K), and pressure to atm (1 atm). The number of moles (n) is mass/molar mass. Rearranging the ideal gas law to solve for molar mass gives: M = (mass * R * T) / (P * V). Substituting the values: M = (0.123 g * 0.0821 L·atm/mol·K * 393 K) / (1 atm * 0.124 L) = 32 g/mol.

0123 G of a Gas Occupy a Volume of 124