AP Chemistryeasymcq1 pt
What is the oxidation number of carbon in CO₃²⁻?
A.+4
B.+2
C.0
D.−4
Explanation
Core Concept
C + 3(−2) = −2, so C = +4. Carbonate's carbon is fully oxidized, matching CO₂.
Correct Answer
A+4
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