Write the molecular formulae for the oxides and sulphides of following elements present.
(a) Sodium (b) Calcium
(c) hydrogen
Write the chemical formulae of the following.
(a) Hydrogen sulphide
(b) Aluminium oxide
(c) Sodium nitrate
(d) Calcium hydroxide
Question 12 Write the molecular formulae for the following compounds
(a) Copper (II) bromide (b) Aluminium (III) nitrate (c) Calcium (II) phosphate (d) Iron (III) sulphide (e) Mercury (II) chloride (f) Magnesium (II) acetate
Question 17 Give the chemical formulae for the following compounds and compute the ratio by mass of the combining elements in each one of them. (a) Ammonia
(b) Carbon monoxide
(c) Hydrogen chloride
(d) Aluminium fluoride
(e) Magnesium sulphide