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2.6 Calculations involving masses

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Question 22

A gaseous sample contains only ethane, C2H6\mathrm{C_2H_6}C2​H6​, and chlorine, Cl2\mathrm{Cl_2}Cl2​. The sample contains 1.204 × 1024 atoms in total and 3.00 g of ethane. Relative atomic masses: H=1\mathrm{H} = 1H=1, C=12\mathrm{C} = 12C=12, Cl=35.5\mathrm{Cl} = 35.5Cl=35.5. The Avogadro constant is 6.02×1023 mol−16.02\times10^{23}\,\mathrm{mol^{-1}}6.02×1023mol−1.

Calculate the mass of chlorine in the sample.

[5]
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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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