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Question 62

A diagram of carbon dioxide must show one carbon atom bonded within a molecule containing two oxygen atoms. Which formula matches that composition?

  1. CO2Correct answer
  2. C2O
  3. CO
  4. C2O2

Explanation

CO2 has one carbon symbol with no following digit and an oxygen symbol followed by 2, so it records one carbon and two oxygen atoms. CO records only one oxygen atom and therefore describes a different oxide of carbon.

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Question 62: A diagram of carbon dioxide must show one carbon atom… · The Periodic Table and Elements · Questena