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18 March, 05:19

Which substance represents a compound? (1) C (s) (3) CO (g) (2) Co (s) (4) O2 (g)

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  1. 18 March, 07:06
    0
    Compound is the same thing as CO.
  2. 18 March, 07:16
    0
    C = Carbon

    CO = Carbon Monoxide

    Co = Cobalt

    O2 = Oxygen

    So the answer is (3) CO
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