9.write three uses of hydrogen
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Answer:
Hydrogen uses :
( 1 )commercial fixation of nitrogen from the air in the Haber ammonia process.
( 2 )Hydrogenation of fats and oils.
( 3 )Methanol production, in hydrodealkylation, hydrocracking, and hydrodesulphurization.
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Explanation:
it is a highly combustible substance
it is used to make hydrochloric acid
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