1. Write the chemical formula for the following compounds:
(i) Sodium Carbonate
(ii) Magnesium Chloride
(iii) Ferrous(II) Oxide
(iv) Ammonium Sulphite

(v) Aluminium Sulphide
(vi) Hydrogen Sulphate

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Solution

Magnesium chloride = MgCl₂
Sodium Carbonate = Na₂CO₃
Ammonium Sulphite = (NH₄)₂SO₃
Ferrous(II) Oxide = FeO
Aluminium Sulphide = Al₂S3
Hydrogen Sulphate = HSO₄^-

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