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Relative atomic mass and relative molecular mass: AQA A‑Level Chemistry questions

AQA A-Level Chemistry past-paper questions on 3.1.2.1 Relative atomic mass and relative molecular mass, 2008–2025, with mark schemes and examiner’s reports where available.

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  1. Q03.3

    June 2025 · AS Paper 1

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass3.1.1.2 Mass number and isotopes
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    The start of question 03

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  2. Q10

    June 2025 · AS Paper 1

    1 mark3.1.2.1 Relative atomic mass and relative molecular mass
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  3. Q01.2

    June 2024 · Paper 1

    3 marks3.1.2.1 Relative atomic mass and relative molecular mass3.1.1.2 Mass number and isotopes
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  4. Q09

    June 2024 · AS Paper 2

    1 mark3.1.2.1 Relative atomic mass and relative molecular mass
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    Your answer

  5. Q08

    June 2023 · Paper 3

    1 mark3.1.2.1 Relative atomic mass and relative molecular mass
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  6. Q20

    June 2023 · AS Paper 2

    1 mark3.1.2.1 Relative atomic mass and relative molecular mass
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  7. Q02.1

    June 2022 · Paper 1

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass3.1.1.2 Mass number and isotopes
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  8. Q01.2

    November 2021 · Paper 2

    3 marks3.3.9.1 Carboxylic acids and esters3.1.2.1 Relative atomic mass and relative molecular mass
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  9. Q02.1

    November 2020 · Paper 1

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass
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  10. Q03.1

    November 2020 · AS Paper 1

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass
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  11. Q17

    November 2020 · AS Paper 2

    1 mark3.1.2.1 Relative atomic mass and relative molecular mass
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  12. Q23

    June 2017 · AS Paper 2

    1 mark3.1.2.3 The ideal gas equation3.1.2.1 Relative atomic mass and relative molecular mass
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  13. Q03.2

    June 2016 · AS Paper 1

    3 marks3.1.2.5 Balanced equations and associated calculations3.1.2.1 Relative atomic mass and relative molecular mass
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  14. Q03.7

    Specimen · Paper 2

    2 marks3.1.1.2 Mass number and isotopes3.1.2.1 Relative atomic mass and relative molecular mass
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  15. Q3(d)

    June 2016 · CHEM4 (old spec)

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass
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  16. Q1(a)

    June 2016 · CHEM1 (old spec)

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass
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  17. Q6(a)(ii)

    June 2015 · CHEM2 (old spec)

    1 mark3.1.2.1 Relative atomic mass and relative molecular mass
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  18. Q1(a)

    June 2013 · CHEM1 (old spec)

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass
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  19. Q5(c)

    June 2013 · CHEM1 (old spec)

    1 mark3.1.2.1 Relative atomic mass and relative molecular mass
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  20. Q1(b)

    June 2011 · CHEM1 (old spec)

    2 marks3.1.2.1 Relative atomic mass and relative molecular mass
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All 32 questions on Relative atomic mass and relative molecular mass, as a list
  1. June 2025, AS Paper 1, Q03.3 (2 marks): Give the meaning of the term relative atomic mass. [2 marks]
  2. June 2025, AS Paper 1, Q10 (1 mark): What is the percentage by mass of sodium in sodium sulfate(VI)? [1 mark] A 19.3 B 22.3 C 32.4 D 36.5
  3. June 2024, Paper 1, Q01.2 (3 marks): Tellurium has a relative atomic mass of 127.6 Iodine has a relative atomic mass of 126.9 Define relative atomic mass. Suggest one property of tellurium that jus
  4. June 2024, AS Paper 2, Q09 (1 mark): What is the Mr of this compound? [1 mark] A 94.0 B 96.0 C 98.0 D 100.0
  5. June 2023, Paper 3, Q08 (1 mark): What is the relative molecular mass (Mr) of benzene-1,4-dicarboxylic acid? [1 mark] A 164.0 B 166.0 C 168.0 D 170.0
  6. June 2023, AS Paper 2, Q20 (1 mark): Which compound has the greatest Mr? [1 mark] A B C D
  7. June 2022, Paper 1, Q02.1 (2 marks): Define the term relative atomic mass. [2 marks]
  8. November 2021, Paper 2, Q01.2 (3 marks): The triester in coconut oil has a relative molecular mass, Mr = 638.0 In the equation shown at the start of Question 01, R represents an alkyl group that can be
  9. November 2020, Paper 1, Q02.1 (2 marks): Give the meaning of the term relative atomic mass. [2 marks]
  10. November 2020, AS Paper 1, Q03.1 (2 marks): Define the term relative atomic mass. [2 marks]
  11. November 2020, AS Paper 2, Q17 (1 mark): Which compound has the lowest relative molecular mass? [1 mark] A ethanoic acid B 1-fluoropropane C propanenitrile D propylamine
  12. June 2017, AS Paper 2, Q23 (1 mark): Two sealed flasks with the same volume are left side by side. Flask A contains 4.0 × 10−3 mol of methane. Flask B contains 340 mg of a different gas. Both gases
  13. June 2016, AS Paper 1, Q03.2 (3 marks): Calculate the amount, in moles, of MHCO3 in 250 cm3 of the solution. Then calculate the experimental value for the Mr of MHCO3. Give your answer to the appropri
  14. Specimen, Paper 2, Q03.7 (2 marks): Mr =
  15. June 2016, CHEM4 (old spec), Q3(d) (2 marks): Calculate the percentage by mass of hydrogen in a molecule of lidocaine. [2 marks]
  16. June 2016, CHEM1 (old spec), Q1(a) (2 marks): Give the meaning of the term relative atomic mass. [2 marks]
  17. June 2015, CHEM2 (old spec), Q6(a)(ii) (1 mark): State why the precise relative atomic mass quoted in Table 1 for the 12C isotope is exactly 12.00000 [1 mark]
  18. June 2013, CHEM1 (old spec), Q1(a) (2 marks): Define the term relative atomic mass.
  19. June 2013, CHEM1 (old spec), Q5(c) (1 mark): Aluminium chloride has a relative molecular mass of 267 in the gas phase. Deduce the formula of the aluminium compound that has a relative molecular mass of 267
  20. June 2011, CHEM1 (old spec), Q1(b) (2 marks): Give the meaning of the term relative atomic mass. (2 marks)
  21. January 2011, CHEM1 (old spec), Q2(c)(i) (2 marks): Give the meaning of the term relative atomic mass.
  22. January 2011, CHEM1 (old spec), Q3(a)(iv) (1 mark): Calculate the relative formula mass, Mr, of M2CO3 Give your answer to 1 decimal place. (1 mark)
  23. January 2011, CHEM1 (old spec), Q3(a)(v) (2 marks): Hence determine the relative atomic mass, Ar, of the metal M and deduce its identity. Ar of M Identity of M (2 marks)
  24. June 2010, CHEM1 (old spec), Q8(b) (4 marks): Define the term relative atomic mass. An organic fertiliser was analysed using a mass spectrometer. The spectrum showed that the nitrogen in the fertiliser was
  25. June 2010, CHEM2 (old spec), Q4(b)(iii) (1 mark): State why the precise relative atomic mass for the 12C isotope is exactly 12.00000 (1 mark)
  26. January 2010, CHEM1 (old spec), Q5(a) (2 marks): Define the term relative atomic mass of an element.
  27. June 2009, CHEM1 (old spec), Q5(a)(i) (2 marks): 5 (a) (i) Define the term relative atomic mass (Ar) of an element. (2 marks)
  28. January 2009, CHEM1 (old spec), Q1(f) (2 marks): 1 (f) The table below gives the relative abundance of each isotope in the mass spectrum of a sample of tungsten. m/z 182 183 184 186 Relative abundance / % 26.4
  29. January 2009, CHEM1 (old spec), Q5(a)(iii) (1 mark): 5 (a) (iii) Calculate the relative formula mass of MCO3 (1 mark)
  30. January 2009, CHEM1 (old spec), Q5(b) (2 marks): 5 (b) Use your answer from part (a) (iii) to deduce the relative atomic mass of metal M and suggest its identity. (If you have been unable to calculate a value
  31. June 2008, CHM6W (2008 spec), Q8 (1 mark): 8 Titanium ore is processed to give a concentrate containing 95%, by mass, of titanium(IV) oxide. The percentage by mass of titanium in this concentrate is A 25
  32. January 2008, CHM1 (2008 spec), Q1(a) (2 marks): (a) Define the term relative atomic mass. (2 marks)

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