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1.1 Formulae, equations and hazards

1.1 Formulae, equations and hazards

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Question 57

When magnesium carbonate is heated it thermally decomposes.

MgCO3(s)→MgO(s)+CO2(g) \text{MgCO}_3(\text{s}) \rightarrow \text{MgO}(\text{s}) + \text{CO}_2(\text{g}) MgCO3​(s)→MgO(s)+CO2​(g)

When 7.550 g of magnesium carbonate is heated, the mass of solid remaining is 3.600 g.

Calculate the mass of carbon dioxide that has been released.

Give your answer to three significant figures.

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1.1 Formulae, equations and hazards Questions

  1. GCSE
  2. /Chemistry
  3. /1.1 Formulae, equations and hazards

230 exam-style questions on Edexcel GCSE Chemistry 1.1 Formulae, equations and hazards, covering 1.1.1 Formulae, word and balanced equations, 1.1.2 Balanced ionic equations, and 1.1.3 Hazard symbols and risk in practical work. Each one has a worked solution and a mark scheme showing where the marks go.

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