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2.6 Calculations involving masses

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Question 8
H

Figure: Containers with 8.0 g He\mathrm{He}He, 32 g O2\mathrm{O_{2}}O2​ and 33 g CO2\mathrm{CO_{2}}CO2​ image

Which container has the greatest number of particles? Use He=4,O2=32\mathrm{He} = 4, \mathrm{O_{2}} = 32He=4,O2​=32 and CO2=44\mathrm{CO_{2}} = 44CO2​=44.

[1]
A

the 8.0 g helium sample

B

the 32 g oxygen sample

C

the 33 g carbon dioxide sample

D

all contain the same number

Markscheme

2.6 Calculations involving masses Questions

  1. GCSE
  2. /Chemistry
  3. /2.6 Calculations involving masses

55 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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