Question

hydrogen and oxygen, when mixed, do not from water​

Answer 1

When molecular hydrogen (H2) and oxygen (O2) are combined and allowed to react together, energy is released and the molecules of hydrogen and oxygen can combine to form either water or hydrogen peroxide. These two processes are represented by the two chemical equations shown at right.

Answer 2

Elements which are chemically mixed in a fixed ratio are called 'compounds'. Hydrogen and Oxygen form water only when they are CHEMICALLY and NOT PHYSICALLY combined. That too, when the molecules are in the ratio of 2 hydrogen and 1 oxygen.

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