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Chemistry · May / June 2023 · Paper 12 · Question 8

5070Relative masses of atoms and molecules

Which statements about relative atomic mass and relative molecular mass are correct? 1 The mass of the different isotopes does not affect relative atomic masses. 2 Only covalent compounds have a relative molecular mass. 3 Relative atomic masses are compared to 1/12 of the mass of one atom of 12C.

  1. A1 and 2 only
  2. B1 and 3 only
  3. C2 and 3 only
  4. D1, 2 and 3

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Correct answer: C. 2 and 3 only

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