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25 September, 13:08

How many molecules of O2 are in 153.9 g O2?

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  1. 25 September, 13:34
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    2.895*10^24

    Explanation:

    mass of Oxygen give = 153.9g

    molar mass of O2 molecule = 16*2=32g/mol

    n = mole

    To find the mole

    n = mass / molar mass

    n = 153.9/32

    n=4.81mol.

    To find the number of molecules of o

    Nm = number of molecule

    Nn = Number of mole

    NA = number of Avogados

    Nm = Nn * NA

    Nm = 4.81 * 6.02*10^23

    Nm = 2.895*10^24
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