Respuesta :
When hydrogen and oxygen combine to form water can be classified as a PRODUCT
The process by which hydrogen and oxygen combine to form water can be classified as Combination reaction.
What is Combination Reaction ?
A combination reaction is a reaction where two or more elements or compounds combine to form a single compound.
Such reactions are represented by equations of the following form :
X + Y → XY.
The combination of two or more elements to form one compound is called a combination reaction.
Therefore, The process by which hydrogen and oxygen combine to form water can be classified as Combination reaction.
Learn more about reactions here ;
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