AP Chemistryeasymcq1 pt
Octane burns completely in excess oxygen. Which products form?
A.Carbon dioxide and water
B.Carbon monoxide and water
C.Carbon dioxide and hydrogen gas
D.Carbon dioxide alone
Explanation
Core Concept
Complete combustion oxidizes every carbon atom to carbon dioxide and every hydrogen atom to water. Excess oxygen guarantees that neither element stalls at a lower oxidation state along the way. Writing these two products first and then balancing is the reliable opening move for any hydrocarbon combustion problem.
Correct Answer
ACarbon dioxide and water
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