(MgSO4+7H2O)? be sure to include the mass of all elements in the formula including the elements in water

138g/mol

73g/mol

245g/mol

120g/mol

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According to given question

(MgSO4+7H2O)=?

mass of Mg=24g/mol

mass of S=32 g/mol

mass of O=16g/mol

mass of H=1 g/mol

mass of (MgSO4+7H2O)=24+32+4*16+7(2+16)=245 g/mol Answer

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