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3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

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Question 7

In the production of rechargeable lithium-ion batteries, cathode efficiency is highly dependent on the mass proportion of active lithium within the cathode material, lithium cobalt oxide (LiCoO2\text{LiCoO}_2LiCoO2​).

Calculate the percentage (%) by mass of lithium in lithium cobalt oxide (LiCoO2\text{LiCoO}_2LiCoO2​). Give your answer to 3 significant figures.

Relative atomic mass (ArA_rAr​): Li=6.9\text{Li} = 6.9Li=6.9. Relative formula mass (MrM_rMr​): LiCoO2=97.8\text{LiCoO}_2 = 97.8LiCoO2​=97.8.

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3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations Questions

  1. GCSE
  2. /Chemistry
  3. /3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations

53 exam-style questions on AQA GCSE Chemistry 3.1 Chemical measurements, conservation of mass and the quantitative interpretation of chemical equations, covering 3.1.1 Conservation of mass and balanced chemical equations, 3.1.2 Relative formula mass, 3.1.3 Mass changes when a reactant or product is a gas, and 3.1.4 Chemical measurements. Each one has a worked solution and a mark scheme showing where the marks go.

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