In which of the following species is the oxidation number of sulfur less than 6?
A. SO3
B. Na2SO4
C. SO2
A.
O: "-2 \\times 3 = -6"
S: +6
B.
Na: "+1 \\times 2 = +2"
O: "-2 \\times 4 = -8"
C.
O: "-2 \\times 2 = -4"
S: +4
Answer: option C. SO2
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