Decomposition Chemical Reaction
A complex substance breaks down to its simpler parts
Example: NH3 --> N2 + H2 Balanced: 2NH3 = N2 + 3H2
H2O --> O2 + H2 Balanced: 2H2O = O2 + 2H2
Note: If you use CHEMIX School for balancing
chemical reactions/equations
you must replace the arrow '-->' by '>' (greater then).
CHEMIX School example - Balancing chemical reactions :
Al + HCl > AlCl3 + H2