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

Question

8 April, 22:52

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Answers (1)

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Shayna · Answer 1

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.

Which of these is a combustion and synthesis reaction?A. CH4 + 2 O2 → CO2 + 2 H2OB. Mg + O2 → MgOC. H2O → H2 + O2D. CaO → Ca + O2