2.6 Calculations involving masses

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Question 38

A sample contains 3.01 × 10²³ oxygen molecules, $O2\mathrm{O_{2}}$ . What is its mass? Use the Avogadro constant 6.02 × 10²³ mol^-1 and $Mr(O2)=32M_r(\mathrm{O_{2}}) = 32$ .

[1]

8.0 g

16 g

32 g

64 g

Markscheme

2.6 Calculations involving masses Questions

GCSE
Chemistry
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.

Question bank·2.6 Calculations involving masses