O Level Chemistry past papers › Topics

Relative masses of atoms and molecules past paper questions

O Level Chemistry 5070 · Stoichiometry. 1 Describe relative atomic mass, Ar, as the average mass of the isotopes of an element compared to 1/12th of the mass of an atom of 12C 2 Define relative molecular mass, Mr, as the sum of the relative atomic masses. Relative formula mass, Mr, will be used for ionic compounds

In Cambridge O Level Chemistry 5070, Relative masses of atoms and molecules came up in 16 of the 72 papers on Paperstreak, for about 1 marks a paper when it does. It last came up in October/November 2025.

Often set with Reversible reactions and equilibrium, Formulae.

17 questions, newest first

1. 5070/11/O/N/25 Question 9 · 1 mark
2. 5070/12/O/N/25 Question 8 · 1 mark
3. 5070/11/M/J/25 Question 11 · 1 mark
4. 5070/12/M/J/25 Question 9 · 1 mark
5. 5070/12/O/N/24 Question 7 · 1 mark
6. 5070/12/O/N/24 Question 8 · 1 mark
7. 5070/11/M/J/24 Question 7 · 1 mark
8. 5070/12/M/J/24 Question 8 · 1 mark
9. 5070/12/O/N/23 Question 7 · 1 mark
10. 5070/12/M/J/23 Question 8 · 1 mark
11. 5070/12/M/J/22 Question 13 · 1 mark
12. 5070/21/M/J/22 Question 5 part (b(iii)) · 1 mark
13. 5070/22/M/J/22 Question 10 part (b(iii)) · 2 marks
14. 5070/12/M/J/21 Question 10 · 1 mark
15. 5070/12/O/N/20 Question 15 · 1 mark
16. 5070/12/M/J/20 Question 14 · 1 mark
17. 5070/22/M/J/20 Question 3 part (a(i)) · 1 mark

More in Stoichiometry: Formulae, The mole and the Avogadro constant.

Questions and mark schemes from Cambridge International past papers. Paperstreak isn't affiliated with Cambridge.