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3 Quantitative chemistry

3 Quantitative chemistry

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Question 49

Manganese is extracted from manganese(II) oxide by reduction with carbon.

a.

Explain why carbon can be used to extract manganese from manganese(II) oxide.

[2]
b.

An equation for the reaction is:

MnO+C→Mn+CO \text{MnO} + \text{C} \rightarrow \text{Mn} + \text{CO} MnO+C→Mn+CO

Calculate the percentage atom economy for the reaction to produce manganese.

Relative atomic masses (ArA_rAr​):

  • C=12\text{C} = 12C=12
  • Mn=55\text{Mn} = 55Mn=55

Relative formula mass (MrM_rMr​):

  • MnO=71\text{MnO} = 71MnO=71

Give your answer to 3 significant figures.

[3]
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3 Quantitative chemistry Questions

  1. GCSE
  2. /Chemistry
  3. /3 Quantitative chemistry

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