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7. Of the balanced chemical equations below, which one most correctly represents a
combustion reaction?
a. CaO + H20 Ca(OH) 2
b. CH4 + 202 CO2 + 2H2O
c. 2 Mg + O202 Mgo
d. 2 N2 + 3H22 NH 3

Answer :

B. CH4 + 2O2 —> CO2 + 2H2O
Combustion reactions produce carbon dioxide and water by reacting a hydrocarbon with oxygen.

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