Questions: Arrange the gases from most dense to least dense at a given temperature and pressure. Most dense Least dense Answer Bank SF6 F2 SO2 CH4 NH3

Arrange the gases from most dense to least dense at a given temperature and pressure.

Most dense

Least dense

Answer Bank
SF6
F2
SO2
CH4
NH3

Transcript text: Arrange the gases from most dense to least dense at a given temperature and pressure. Most dense Least dense Answer Bank $\mathrm{SF}_{6}$ $\mathrm{F}_{2}$ $\mathrm{SO}_{2}$ $\mathrm{CH}_{4}$ $\mathrm{NH}_{3}$

Solution

Solution Steps

Step 1: Calculate the molar mass of each gas

The density of a gas is directly proportional to its molar mass. Therefore, the gas with the highest molar mass will be the most dense, and the gas with the lowest molar mass will be the least dense.

SF₆: (1 x 32.07 g/mol) + (6 x 19.00 g/mol) = 146.07 g/mol
F₂: 2 x 19.00 g/mol = 38.00 g/mol
SO₂: (1 x 32.07 g/mol) + (2 x 16.00 g/mol) = 64.07 g/mol
CH₄: (1 x 12.01 g/mol) + (4 x 1.01 g/mol) = 16.05 g/mol
NH₃: (1 x 14.01 g/mol) + (3 x 1.01 g/mol) = 17.04 g/mol

Step 2: Arrange the gases in order of decreasing molar mass

The order from most dense to least dense: SF₆ > SO₂ > F₂ > NH₃ > CH₄