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2.6 Calculations involving masses

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Question 13
F

Figure: Open-flask apparatus for calcium carbonate reacting with hydrochloric acid image

Why does the balance reading decrease?

[1]
A

The balance becomes less accurate as the flask warms

B

Atoms are destroyed during the reaction

C

The calcium carbonate dissolves in the acid

D

Carbon dioxide gas escapes from the flask

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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