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1.1 Formulae, equations and hazards

1.1 Formulae, equations and hazards

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Question 116

Copper(II) carbonate decomposes on heating to form copper(II) oxide and carbon dioxide.

CuCO3(s)→CuO(s)+CO2(g) \text{CuCO}_3(\text{s}) \rightarrow \text{CuO}(\text{s}) + \text{CO}_2(\text{g}) CuCO3​(s)→CuO(s)+CO2​(g)

6.500 g of green CuCO3\text{CuCO}_3CuCO3​ was heated strongly in a crucible until the reaction was complete. 4.185 g of black solid remained.

Calculate the mass of carbon dioxide gas released.

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Markscheme

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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