How many moles are there in a 2,500 cm ‘sample of oxygen at a temperature of 24 °C and a pressure of 125 kPa?

Question

How many moles are there in a 2,500 cm ‘sample of oxygen at a temperature of 24 °C and a pressure
of 125 kPa?

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Thu Giang 4 years 2021-08-05T08:41:53+00:00 1 Answers 6 views 0

Answers ( )

  1. bonexptip
    0
    2021-08-05T08:43:30+00:00
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    Explanation:

    using the formula pv=nRt

    where p= pressure =125

    v= volume =2500= 25.oom3 to meter

    n = mumber of moles =?

    T= temperature = 24 =24+273=297k

    molarity \: \: constant \: = 8.3j mol {}^{- 1} {k}^{- 1}

    which is given as R

    so inputting the values we have

    125×25=n×8.3×297

    3125=2465.1n

    dividing all with the coefficient of n we have

    \frac{3125}{2465.1} = 2465.1 \24651

    1.27= n

    therefore no of moles =1.27

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