Write the chemical formula of the following:
(1) Calcium hydroxide.
(2) Magnesium hydroxide.
(3) Aluminum sulphate.
(4) Sodium carbonate.
(5) Zinc phosphate.
(6) Lithium nitrate.
(7) Copper carbonate.
(8) Potassium carbonate.
(9) Magnesium sulphate.
(10) Calcium phosphate.