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13 January, 19:13

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

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Answers (1)
  1. 13 January, 22:30
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    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.
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