Which of the gas samples shown below in identical containers has the lowest density (g/L)?

Question

Quizplus · Accepted Answer

The ideal gas law states that density is inversely proportional to molar mass at constant pressure and temperature. Since all of the gases are in identical containers with the same pressure and temperature, the gas with the lowest molar mass will have the lowest density. Looking at the periodic table, we can see that hydrogen (H2) has the lowest molar mass out of all the choices given. Therefore, choice A, which contains H2, has the lowest density.

Which of the Gas Samples Shown Below in Identical Containers