Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

Which sample has the greatest number of molecules?

  • A$16\,\text{g}$ of methane, $\text{CH}_4(g)$
  • B$16\,\text{g}$ of oxygen, $\text{O}_2(g)$
  • C$16\,\text{g}$ of phosphorus, $\text{P}_4(s)$
  • D$16\,\text{dm}^3$ of methane at r.t.p., $\text{CH}_4(g)$

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