CU2S(s) + O2(g) → 2CU(s) + SO2(g)

What is the change in the oxidation number of copper in the reaction above?

  • A +1 to 0
  • B 0 to +2
  • C +2 to +1
  • D 0 to +1

The correct answer is A. +1 to 0

No explanation given
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