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6.2 Quantitative analysis

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Question 43

Ozone decomposes according to the equation

2O3(g)→3O2(g)\mathrm{2O_3(g) \rightarrow 3O_2(g)}2O3​(g)→3O2​(g)

The reaction forms 90 cm3 of oxygen. All gas volumes are measured at the same temperature and pressure.

What volume of ozone decomposes?

[1]
A

30 cm330\,\mathrm{cm^3}30cm3

B

90 cm390\,\mathrm{cm^3}90cm3

C

135 cm3135\,\mathrm{cm^3}135cm3

D

60 cm360\,\mathrm{cm^3}60cm3

Markscheme

6.2 Quantitative analysis Questions

  1. GCSE
  2. /Chemistry
  3. /6.2 Quantitative analysis

151 exam-style questions on Edexcel GCSE Chemistry 6.2 Quantitative analysis, covering 6.2.1 Concentration in mol dm⁻³ and titration calculations, 6.2.2 Percentage yield and why actual yield falls short, 6.2.3 Atom economy of a reaction, 6.2.4 Choosing a reaction pathway, and 6.2.5 Molar volume of gases and Avogadro's law. Each one has a worked solution and a mark scheme showing where the marks go.

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