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Hydrogen -
оттек
сутек
кальций
азот
N2 + 3H2=
N2H3
2NH3
NH2
3NH3
What is the most important compound og hydrogen?
water
ammonia
hydrochloric acid
sulfuric acid
What process is the reaction of hydrogen with oxygen?
endothermic
exchange
exothermic
decomposition
How many isotopes has hydrogen?
2
3
4
5
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