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NEED HELP PLEASE HURRY

Which of the following are decomposition reactions? Select all that apply.


H2CO3 -> CO2 + H2O

CaCO3 -> CaO + CO2

2H2O -> 2H2 + O2

3Mg + N2 -> Mg3N2

2NaCl -> 2Na + Cl2

Respuesta :

Answer:

I believe it would be the last 2

Explanation:

the 4th one is magnesium and something else but that's with decomposition and so is the last one. the first three has water and oxygen and stuff that doesn't rly do decomposition

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