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Monitoring chemical reactions

Monitoring chemical reactions

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Question 1

Lead(II) nitrate decomposes into lead(II) oxide, nitrogen dioxide, and oxygen according to the following balanced equation:

2Pb(NO3)2→2PbO+4NO2+O2 2\text{Pb}(\text{NO}_3)_2 \rightarrow 2\text{PbO} + 4\text{NO}_2 + \text{O}_2 2Pb(NO3​)2​→2PbO+4NO2​+O2​

How many moles of products are formed if 12 mol of lead(II) nitrate decomposes?

A

12 mol12\text{ mol}12 mol of PbO\text{PbO}PbO, 12 mol12\text{ mol}12 mol of NO2\text{NO}_2NO2​, 12 mol12\text{ mol}12 mol of O2\text{O}_2O2​

B

12 mol12\text{ mol}12 mol of PbO\text{PbO}PbO, 24 mol24\text{ mol}24 mol of NO2\text{NO}_2NO2​, 6 mol6\text{ mol}6 mol of O2\text{O}_2O2​

C

24 mol24\text{ mol}24 mol of PbO\text{PbO}PbO, 12 mol12\text{ mol}12 mol of NO2\text{NO}_2NO2​, 6 mol6\text{ mol}6 mol of O2\text{O}_2O2​

D

24 mol24\text{ mol}24 mol of PbO\text{PbO}PbO, 24 mol24\text{ mol}24 mol of NO2\text{NO}_2NO2​, 12 mol12\text{ mol}12 mol of O2\text{O}_2O2​

Markscheme

Monitoring chemical reactions Questions

  1. GCSE
  2. /Chemistry
  3. /Monitoring chemical reactions

91 exam-style questions on OCR GCSE Chemistry Monitoring chemical reactions. Each one has a worked solution and a mark scheme showing where the marks go.

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