The document discusses different types of chemical reactions, primarily focusing on decomposition reactions, where one reactant produces multiple products. It also touches on combustion, which involves oxidation of materials with oxygen, and synthesis, which is the reverse of decomposition. Examples include burning hydrocarbons and hydrogen to illustrate these processes.

1. This is a decomposition reaction. Notes: (1)combustion: things react with oxygen,
therefore they get oxidized. e.g. burning fuels, where hydrocarbons react with oxygen to form
oxides (water and carbon dioxide). (2)decomposition: only one reactant to the left , but more
than one species form on the right. Obviously this reaction is decomposition. (3)synthesis: the
reverse of decomposition. Several reactants react to form one product. (4)water forming: water
must forms on the right side. e.g. Burn hydrogen in oxygen to get water.
Solution
This is a decomposition reaction. Notes: (1)combustion: things react with oxygen,
therefore they get oxidized. e.g. burning fuels, where hydrocarbons react with oxygen to form
oxides (water and carbon dioxide). (2)decomposition: only one reactant to the left , but more
than one species form on the right. Obviously this reaction is decomposition. (3)synthesis: the
reverse of decomposition. Several reactants react to form one product. (4)water forming: water
must forms on the right side. e.g. Burn hydrogen in oxygen to get water.