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Which of these is a combustion and synthesis reaction?

A. CH4 + 2 O2 → CO2 + 2 H2O

B. Mg + O2 → MgO

C. H2O → H2 + O2

D. CaO → Ca + O2

Respuesta :

mcknightashlyn
A is the correct answer. A combustion reaction creates carbon dioxide and water. A is the only answer choice were carbon dioxide and water are made.

Answer:

It's B!

Explanation:

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