6. Exemplar - Molecular formula of the compounds

Choose the correct answer:
Answer variants:
\(Mg(CH_3COO)_2\)
\(FeSO_4\)
\(Fe_2S\)
\(HgCl_2\)
\(MgSO_4\)
\(Al(NO_3)_3\)
\(Fe_2S_3\)
\(CuBr_2\)
\(Ca_3(PO_4)_2\)
Write the molecular formulae for the following compounds:
 
i. Calcium (II) phosphate =
 
ii. Magnesium sulphate =
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