Chemistry 0620 · IGCSE · The mole and the Avogadro constant

The mole and the Avogadro constant — practice question

The combustion equation for methane is given here. $\text{CH}_4 + 2\text{O}_2 \rightarrow \text{CO}_2 + 2\text{H}_2\text{O}$ What mass of methane is needed to make $36\,\text{g}$ of water?

  • A$16\,\text{g}$
  • B$18\,\text{g}$
  • C$32\,\text{g}$
  • D$64\,\text{g}$

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