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3.5 Use of amount of substance in relation to volumes of gases

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Question 17

Zinc carbonate decomposes completely when heated.

ZnCO3→ZnO+CO2\text{ZnCO}_3 \rightarrow \text{ZnO} + \text{CO}_2ZnCO3​→ZnO+CO2​

The carbon dioxide produced is passed over hot carbon. All the carbon dioxide reacts according to the equation:

CO2+C→2CO\text{CO}_2 + \text{C} \rightarrow 2\text{CO}CO2​+C→2CO

The relative formula mass of zinc carbonate, ZnCO3\text{ZnCO}_3ZnCO3​, is 125. At room temperature and pressure, one mole of any gas occupies 24 dm3.

A sample of zinc carbonate is heated. The carbon monoxide produced has a volume of 1.92 dm3 at room temperature and pressure.

Calculate the mass of zinc carbonate that was heated.

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3.5 Use of amount of substance in relation to volumes of gases Questions

  1. GCSE
  2. /Chemistry
  3. /3.5 Use of amount of substance in relation to volumes of gases

100 exam-style questions on AQA GCSE Chemistry 3.5 Use of amount of substance in relation to volumes of gases, covering 3.5.1 Volumes of gases. Each one has a worked solution and a mark scheme showing where the marks go.

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