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2.6 Calculations involving masses

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Question 15

A laboratory technician analyses a sample of calcium hydroxide, Ca(OH)2\mathrm{Ca(OH)_{2}}Ca(OH)2​.

Relative atomic masses: H = 1, O = 16, Ca = 40

Calculate the value of Mr M_r\,Mr​ for the formula of calcium hydroxide.

[2]
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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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