(Answered) 1 write correct formulae for the followinga sodium

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1. Write correct formulae for the following:

a) sodium chloride

b) calcium bromide

c) aluminum sulfide

d) magnesium sulfate

e) phosphoric acid

2. Using the electron dot formulae (Lewis structures) with only the valence electrons, show the bonding in:

a) beryllium chloride

b) ammonia (NH₃)

c) methylene chloride (CH₂Cl₂)

d) calcium chloride

e) acetylene (C₂H₂)

3. Balance the following chemical equations:

a) K₂CO₃ + HNO₃ →KNO₃ + CO₂ + H₂O

b) KClO₃ →KCl + O₂

4. Write balanced equations for the following: (3 marks each)

a) sodium + chlorine gas (Cl₂) →sodium chloride

b) nitric acid + calcium hydroxide →calcium nitrate + water

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