what kind of reactant is 2H2O + energy -> 2H2 + O2?

Answer 1

Electrolysis of water

Answer 2

H2+(1/2)O2 <=> H2O + energy

However, this is NONSTANDARD and will cause difficulty when you try to do some things in the future. The first way will ALWAYS be acceptable, so use it.



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Chemistry is EXTREMELY important in life. WTF are you talking about? Do you like to use soap? CDs? Computers? Deodorant? Do you like to wear clothes? Do you like to drink pop? Do you like to be able to drive around?

All of these things require chemistry. In fact, you could not name one thing in modern life that does not somehow use chemistry. So don't say that chemisty is not important, just