–C (g) + O2 (g) à CO2 (g)
–Zn (s) + I2 (s) à ZnI2 (s)
–2Al (s) + 3I2 (s) à 2AlI3 (s)
–2Al (s) + 3Br2 (l) à 2AlBr3 (s)
The equations above are referred to as chemical
(or symbolic) equations.
Notice a couple of things that’s different about a chemical
equation compared to word equation:
1.Chemical equation
includes symbols in bracket next to the chemicals involved
in the process
2.Coefficients in front
of the formula of the chemicals involved in the chemical process.