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27 March, 17:38

If I have an unknown quantity of gas at a pressure of 750 torr, a volume of 25 liters, and a temperature of 300 K, how many moles of gas do I have?

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  1. 27 March, 18:02
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    1 mole

    Explanation:

    Data obtained from the question include:

    P (pressure) = 750 torr

    But 760torr = 1atm

    750 torr = 750/760 = 0.99atm

    V (volume) = 25L

    T (temperature) = 300K

    R (gas constant) = 0.082atm. L/Kmol

    n (number of mole) = ?

    Using the ideal gas equation PV = nRT, we can easily find the number of mole as illustrated below:

    PV = nRT

    n = PV / RT

    n = 0.99 x 25 / 0.082 x 300k

    n = 1 mole

    Therefore, the number of mole of the gas is 1 mole
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