What is the mass of 20.0 L of sulfur dioxide (SO2) at STP?

Mass = 57.05 g

Explanation:

Given dа ta:

Volume of SO₂ = 20.0 L

Temperature = standard = 273 K

Pressure = standard = 1 atm

Mass of SO₂ = ?

Solution:

The given problem will be solve by using general gas equation,

PV = nRT

P = Pressure

V = volume

n = number of moles

R = general gas constant = 0.0821 atm. L / mol. K

T = temperature in kelvin

n = PV/RT

n = 1 atm * 20.0 L / 0.0821 atm. L / mol. K * 273 k

n = 20.0 / 22.41/mol

n = 0.89 mol

Mass of SO₂:

Mass = number of moles * molar mass

Mass = 0.89 mol * 64.1 g/mol

Mass = 57.05 g