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2.6 Calculations involving masses

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Question 14

A sample of aluminium contains 4.515 × 1023 atoms. How many moles of aluminium are present in the sample? Use the Avogadro constant 6.02 × 1023 mol-1.

[1]
A

0.750 mol0.750\ \mathrm{mol}0.750 mol

B

7.50 mol7.50\ \mathrm{mol}7.50 mol

C

1.33 mol1.33\ \mathrm{mol}1.33 mol

D

0.0750 mol0.0750\ \mathrm{mol}0.0750 mol

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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