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WEEK: 5
FORMULAE AND EQUATIONS
CONTENTS:
PERIOD 1: CHEMICAL FORMULAE
Chemical formula can be defined as a collection of two or more symbols to represent one molecule of the compound. For example, the formula of tetraoxosulphate(VI) acid is H2SO4. This formula shows that in a molecule of tetraoxosulphate(VI) acid, there are two atoms of hydrogen, one atom of sulphur and four atoms of oxygen.
The table below contain examples of compounds with their formulae
Compounds | Formulae |
Oxygen molecule | O2 |
Hydrogen molecule | H2 |
Hydrogen chloride | HCl |
Potassium chloride | KCl |
Magnesium tetraoxosulphate(VI) | MgSO4 |
Hydrogen sulphide | H2S |
Bromine Molecule | Br2 |
Ozone | O3 |
EVALUATION
Write the chemical formulae of the following:
PERIOD 2: CHEMICAL EQUATIONS
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