Asked by rose

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

i would really appreciate anyone's help
Answered by DrBob222
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 = ?
Answered by rose
thank you!!
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