Chemistry 9701 · AS & A Level · Atoms, molecules and stoichiometry

Atoms, molecules and stoichiometry — practice question

Which gas sample below has the same atom count as $1\,\text{g}$ of hydrogen gas?

  • A$22\,\text{g}$ of carbon dioxide ($M_r$: $\text{CO}_2$, $44$)
  • B$8\,\text{g}$ of methane ($M_r$: $\text{CH}_4$, $16$)
  • C$20\,\text{g}$ of neon ($M_r$: $\text{Ne}$, $20$)
  • D$8\,\text{g}$ of ozone ($M_r$: $\text{O}_3$, $48$)

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