A synthesis reaction is when two or more substances combine to form another substance.
A synthesis reaction is when there is a combination of two or more substances and a compound results.
A substance that reveals, through characteristic color changes, the degree of acidity or basicity of solutions. Could also be a light to notify of a components operation.
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Synthesis reactions are generally characterized by being exothermic. Decomposition reactions are usually endothermic.
A chemical reaction
the thermal energy
Redox reaction is chemical reactions. This happens when atoms oxidation state changes.
Hydrochloric acid -APEX;)