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21 November, 08:54

If I have an unknown quantity of gas at a pressure of 5.0 atm, a volume of 17 liters, and a temperature of 45°C, how many moles of gas do I have?

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  1. 21 November, 09:15
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    Ok to find the amount of moles of gas you have, you need to use the ideal gas law to solve this problem which is PV=nRT

    P is pressure in atm

    V is volume in Liters

    n is the amount of substance (moles)

    R is the ideal gas constant (0.0821)

    T is the temperature (make sure its in kelvin) this will be 45+273 = 318K

    Now to solve plug the values into the equation

    (5) (17) = n (0.0821) (318)

    Now solve which will be:

    85 = 26.1078n

    Then you have to isolate the variable n by dividing both sides by 26.1078 which will get you a final answer of:

    3.2557 moles (rounded)
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