Uranium hexafluoride is a solid at room temperature, but it boils at 56°C. Determine the density of uranium hexafluoride at 73°C at 763 torr.

Density = 12.40 g/L (or) 0.01240 g/mL

Solution:

Data Given;

Pressure = P = 763 torr = 1.00395 atm

Temperature = T = 73 °C + 273.15 = 346.15 K

M. mass of UF₆ = M = 352.02 g/mol

Gas Constant = R = 0.0821 atm. L. mol⁻¹. K⁻¹

Formula Used,

Density = P M / R T

Putting values,

Density = (1.00395 atm * 352.02 g. mol⁻¹) : (0.0821 atm. L. mol⁻¹. K⁻¹ * 346.15 K)

Density = 12.40 g/L (or) 0.01240 g/mL