Give the correct name for the following compounds. Na2CO3, Mg (CH3 CO2)2, Mn(NO2)2, Mg3 (PO4)2

The correct names for the following compounds are:

- Na2CO3: Sodium carbonate
- Mg(CH3CO2)2: Magnesium acetate
- Mn(NO2)2: Manganese(II) nitrite
- Mg3(PO4)2: Magnesium phosphate