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15 July, 03:08

A 45.0L gas cylinder contains 988 He at 23 degrees C what is the pressure inside the cylinder

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  1. 15 July, 03:27
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    P = 133.4 atm

    Explanation:

    Given dа ta:

    Mass of helium = 988 g

    Volume = 45.0 L

    Temperature = 23°C (23+273 = 296 K)

    Pressure of cylinder = ?

    Solution:

    Number of moles of helium:

    Number of moles = mass / molar mass

    Number of moles = 988 g / 4 g/mol

    Number of moles = 247 mol

    Pressure:

    PV = nRT

    P = nRT/V

    P = 247 mol * 0.0821. atm. L/mol. K * 296 K / 45 L

    P = 6002.5 / 45 L

    P = 133.4 atm
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