Chemistry 5070 · O Level · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

The relative formula masses of four compounds are provided. A student has a $1.0\,\text{g}$ sample of each compound. Which sample includes the greatest number of moles of oxygen atoms?

  • A$\text{Al}_2\text{O}_3$ (relative formula mass $102$)
  • B$\text{CuO}$ (relative formula mass $80$)
  • C$\text{H}_2\text{SO}_4$ (relative formula mass $98$)
  • D$\text{HNO}_3$ (relative formula mass $63$)

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