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26 June, 15:52

Find the molar mass of each gas measured at the specified conditions. a) 3.48 g of gas occupying 1.52 L at 265 K and 1.63 atm. Answer in units of g/mol.

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  1. 26 June, 16:49
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    Molar mass = 31.64 g/mol

    Explanation:

    Given dа ta:

    Mass of gas = 3.48 g

    Volume of gas = 1.52 L

    Temperature of gas = 265 K

    Pressure of gas = 1.63 atm

    Molar mass of gas = ?

    Solution:

    Formula:

    Molar mass = Mass / number of moles

    First of all we will calculate the number of moles from given data.

    PV = nRT

    P = pressure

    V = volume

    n = number of mole

    R = ideal gas constant

    T = Temperature

    n = PV/RT

    n = 1.63 atm * 1.52 L / 0.0821 atm. L / mol. K * 265 K

    n = 2.48 / 21.76/mol

    n = 0.11 mol

    Molar mass:

    Molar mass = Mass / number of moles

    Molar mass = 3.48 g / 0.11 mol

    Molar mass = 31.64 g/mol
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