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2.6 Calculations involving masses

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Question 42

A technician compares two samples. Each sample consists only of the compound shown.

compoundformulamass of sample
titanium dioxideTiO2\mathrm{TiO_{2}}TiO2​25.0 g
silicon dioxideSiO2\mathrm{SiO_{2}}SiO2​22.5 g

Use Ar(Ti)=48A_r(\mathrm{Ti}) = 48Ar​(Ti)=48, Ar(Si)=28A_r(\mathrm{Si}) = 28Ar​(Si)=28 and Ar(O)=16A_r(\mathrm{O}) = 16Ar​(O)=16.

Calculate how much greater the mass of oxygen is in the sample that contains more oxygen.

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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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