Syntesis+reaction

SYNTHESIS reaction

Two molecules combine to form one more complex substance. A + B => AB for example when Fe combines with oxygen gas O2 Fe + O2 --> FeO but you must be sure to always balance the equation and the only way to do that is, to change the coeffiecient. in this case, in order to consider the two oxygen atoms Fe will need another atom. Because there is one Oxygen evident in the product one can add a coefficient of 2, to balance it. Fe + O2 --> (2)FeO Because of that coeffecient Fe needs balancing and ultimatly it needs 2 for a coeffeicient. therefore the reaction is ( 2 ) Fe + O2 --> ( 2 )FeO