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Find the molecular mass of FeSO4 7H(2)O....

Find the molecular mass of `FeSO_4 7H_(2)O`.

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Molecular mass of `FeSO_(4)7H_(2)O`
Atomic mass of `Fe=55.845`
Atomic mass of `S=32.065`
Atomic mass of `O=15.994xx11=63.304`.
Atomic mass of `H=1.00794xx14=5.076`
Molecular mass of `FeSO_(4)7H_(2)O = 55.945+32.065+(4xx15.994)+7xx(1.0079xx2+15.9994)`
`=278.014g //"mol"` .
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