Answer:
M = 64.1 g/mol
Explanation:
Given data:
Density of gas = 2.18 g/L
Temperature = 67 °C
Pressure = 720 mmHg
Molar mass =?
Solution:
We will convert the mmHg to atm.
720/ 760 = 0.95 atm
Temperature from °C to K.
67 + 273 = 340 K
Formula:
PM = dRT
M = dRT / P
M = 2.18 g/L ×0.0821 atm. L . mol⁻¹ . K¹ × 340 k / 0.95 atm
M = 60.9 atm. g/mol /0.95 atm
M = 64.1 g/mol
