Question

when hydrogen burns in air the change is chemical. Give two teasons to support your answer​

Answer 1

Answer:

give two reasons to support this assertion. When hydrogen burns in air, it combines with atmospheric oxygen to form water. Since hydrogen and oxygen are undergoing a chemical change to become chemically bonded together producing H2O the change is chemical in nature.18-Sep-2013

Answer 2

Answer:

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• In a flame of pure hydrogen gas, burning in air, the hydrogen (H2) reacts with oxygen (O2) to form water (H2O) and releases energy.
• If carried out in atmospheric air instead of pure oxygen, as is usually the case, hydrogen combustion may yield small amounts of nitrogen oxides, along with the water vapor.

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Explanation:

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