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20 September, 11:32

A gas occupies a volume of 67.54 liters at 158°C and 4.87 atm pressure. Calculate the number of moles of this gas.

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  1. 20 September, 13:33
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    The number of moles of the gas is 9.295 moles or 9.30 moles

    Explanation:

    We use PV = nRT

    Where P = 4.87 atm;

    V = 67.54 L

    R = 0.0821Latm/molK

    T = 158 C = 158 + 273 K = 431 K

    the number of moles can be obtained by substituting the values in the respective columns and solve for n

    n = PV / RT

    n = 4.87 * 67.54 / 0.0821 * 431

    n = 328.9198 / 35.3851

    n = 9.295moles

    The number of moles is approximately 9.30moles.
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