Magnesium sulfate, MgSO4, forms several different hydrates. One of the hydrrates has a molar mass of 246.6 g/mol. Another hydrate has a mola mass of 210.5g/mol. What are the chemical formulas for two hydrate.

Question

Magnesium sulfate, MgSO4, forms several different hydrates. One of the hydrrates has a molar mass of 246.6 g/mol. Another hydrate has a  mola mass of 210.5g/mol. What are the chemical formulas for two hydrate.

anonymous · Answer

Subtract molar mass of MgSO4 i.e 120 from 246.6 and 210.5 to find the mass of water in each hydrate. 
Now divide by the molar mass of water i.e 18 to find the no. of moles of water. 
--->18n= 126.6
----> n=7       Formula is MgSO4. 7H2O


-----> 18n= 90.5
-----> n=5     Formula is MgSO4. 5H2O

anonymous · Answer

the answer is wrong, btw thank youuu :D

anonymous · Answer

Sorry. What's the answer then?