Answer:
Mass = 19.85 g
Step-by-step explanation:
Given data:
Volume of chlorine gas = 80.4 L
Temperature = standard = 273.15 K
Pressure = standard = 1 atm
Mass of chlorine = ?
Molar mass of chlorine gas = 70.9 g/mol
Solution:
PV = nRT
R = general gas constant = 0.0821 atm.L/mol.K
By putting values,
1 atm × 80.4 L = n× 0.0821 atm.L/mol.K × 273.15 K
80.4 atm.L = n× 22.43 atm.L/mol
n = 22.43 atm.L/mol / 80.4 atm.L
n = 0.28 mol
Mass of Cl₂:
Mass = number of moles × molar mass
Mass = 0.28 mol × 70.9 g/mol
Mass = 19.85 g