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9 February, 16:53

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

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  1. 9 February, 17:22
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    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
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