Chemistry 0620 · IGCSE · Relative masses of atoms and molecules

Relative masses of atoms and molecules — practice question

What does relative molecular mass, $M_r$, mean?

  • AIt is the average mass of the isotopes in a compound.
  • BIt is the sum of the atomic numbers in a compound.
  • CIt is the sum of the relative atomic masses in a compound.
  • DIt is the total number of atoms in a compound.

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