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2.6 Calculations involving masses

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Question 5

A sample of an oxide of sulfur is analysed. The table shows the mass of each element in the sample.

ElementMass in sample / gRelative atomic mass, ArA_rAr​
sulfur3.2032
oxygen4.8016

What is the empirical formula that agrees with these results?

[1]
A

S2O3\mathrm{S_{2}O_{3}}S2​O3​

B

SO3\mathrm{SO_{3}}SO3​

C

S3O2\mathrm{S_{3}O_{2}}S3​O2​

D

S3O\mathrm{S_{3}O}S3​O

Markscheme

2.6 Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /2.6 Calculations involving masses

142 exam-style questions on Edexcel GCSE Chemistry 2.6 Calculations involving masses, covering 2.6.1 Relative formula mass and percentage composition, 2.6.2 Empirical and molecular formulae, 2.6.3 Conservation of mass, 2.6.4 Reacting masses and concentration in g dm⁻³, 2.6.5 The mole and the Avogadro constant, and 2.6.6 Limiting reactants and stoichiometry. Each one has a worked solution and a mark scheme showing where the marks go.

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