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25 June, 02:40

What mass of Neon gas is needed to occupy 2.56 L tube at STP?

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  1. 25 June, 06:10
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    Mass = 2.222 g

    Explanation:

    Given dа ta:

    Volume of neon gas = 2.56 L

    Temperature = 273 K

    Pressure = 1 atm

    Mass of neon gas = ?

    Solution:

    PV = nRT

    n = PV / RT

    n = 1 atm * 2.56 L / 0.0821 atm. L / mol. K * 273 K

    n = 2.56 L. atm / 22.4 atm. L / mol

    n = 0.11 mol

    Mass = number of moles * molar mass

    Mass = 0.11 mol * 20.2 g/mol

    Mass = 2.222 g
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