The density of an unknown gas is 1.72 g/L at 750.0 torr and 30.0 $\circ$ C. Which of the following could be the unknown gas?

Question

Quizplus · Accepted Answer

The molar mass of the gas can be calculated using the Ideal Gas Law: PV = nRT. Rearranging, we get n/V = P/RT. Then, we can use the density given (1.72 g/L) to find the molar mass:

1.72 g/L / (22.4 L/mol) = (P/RT) / (6.022 x 10^23 /mol)

Solving for P/RT gives approximately 1.7 x 10^-3. We can compare this value to the ratios of P/RT for different gases and choose the gas that is closest. Checking each option, we find that only option C (N2O) has a P/RT ratio within a reasonable range. Therefore, N2O is the best choice for the unknown gas.

The Density of an Unknown Gas Is 1 ∘\circ∘ C Which of the Following Could Be the Unknown Gas

The Density of an Unknown Gas Is 1 $\circ$ C Which of the Following Could Be the Unknown Gas