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

Atoms, molecules and stoichiometry — practice question

A $0.005\,\text{mol}$ portion of anhydrous calcium carbonate was heated until thermal decomposition was complete, forming $100\,\text{cm}^3$ of gas when measured at a particular temperature and pressure. In a different experiment, also performed at the same temperature and pressure, a $0.005\,\text{mol}$ portion of anhydrous calcium nitrate was fully decomposed by heating. The volume of the gaseous products was then measured. What total volume of gaseous products was produced from the calcium nitrate?

  • A$50\,\text{cm}^3$
  • B$100\,\text{cm}^3$
  • C$200\,\text{cm}^3$
  • D$250\,\text{cm}^3$

Worked solution & mark scheme

This 1-mark question has a full step-by-step worked solution and mark scheme.

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI