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The molecules of hydrogen and oxygen com...

The molecules of hydrogen and oxygen combined to form the new substance water.
a) Write the combination reaction.
b) Write two examples for the reaction.

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a) The reaction in which two or more simple substance combine together to form a compound is called combination reaction.
b) . N_2 + 3H_2 rarr 2NH_3.
.2Mg + O_2 rarr 2MgO.
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