chemistry

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if 125g of magnesium sulfate heptahydrate is completely dehydrated, how many grams of anhydrous salt will remain?

i would really appreciate anyone's help

  • chemistry -

    MgSO4.7H2O ==> MgSO4 + 7H2O

    mols MgSO4.7H2O = grams/molar mass = about 0.5 mol but that's approximate.
    Therefore, you should obtain approximately 0.5 mol MgSO4.
    g = mols x molar mas = ?

  • chemistry -

    thank you!!

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