Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

Which gas sample has the least number of molecules?

  • A$4\,\text{g}$ of helium
  • B$16\,\text{g}$ of oxygen
  • C$28\,\text{g}$ of carbon monoxide
  • D$28\,\text{g}$ of nitrogen

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