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Anonymous asked in Science & MathematicsChemistry · 1 decade ago

Calculate number of oxygen atoms contained in 20.00 g sample?

Calculate number of oxygen atoms contained in 20.00 g sample of Fe2(SO4)3

Can someone please show steps of how its done

Thanks in advance :)

1 Answer

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  • Dr.A
    Lv 7
    1 decade ago
    Favorite Answer

    Molar mass = 399.9 g/mol

    Moles Fe2(SO4)3 = 20.00 / 399.9 = 0.0500

    Moles O = 12 x 0.0500 = 0.600

    Atoms O = 0.600 x 6.02x10^23 = 3.61 x 10^23

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