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The mole and the Avogadro constant past paper questions

O Level Chemistry 5070 · Stoichiometry. 1 State that the mole, mol, is the unit of amount of substance and that one mole contains 6.02 × 1023 particles, e.g. atoms, ions, molecules; this number is the Avogadro constant 2 Use the relationship amount of substance (mol) = mass (g) molar mass (g / mol) to calculate: (a) amount of substance (b) mass (c) molar mass (d) relative atomic mass or relative molecular / formula mass (e) number of particles, using the value of the Avogadro constant 3 Use the molar gas volume, taken as 24 dm3 at room temperature and pressure, r.t.p., in calculations involving gases 4 State that concentration can be measured in g / dm3 or mol / dm3 5 Calculate stoichiometric reacting masses, limiting reactants, volumes of gases at r.t.p., volumes of solutions and concentrations of solutions expressed in g / dm3 and mol / dm3, including conversion between cm3 and dm3 6 Use experimental data to calculate the co

In Cambridge O Level Chemistry 5070, The mole and the Avogadro constant came up in 70 of the 72 papers on Paperstreak, for about 6 marks a paper when it does. It last came up in October/November 2025.

Often set with Formulae, Experimental design, The characteristic properties of acids and bases, Exothermic and endothermic reactions.

168 questions, newest first

  1. 5070/11/O/N/25 Question 10 · 1 mark
  2. 5070/11/O/N/25 Question 11 · 1 mark
  3. 5070/12/O/N/25 Question 9 · 1 mark
  4. 5070/12/O/N/25 Question 10 · 1 mark
  5. 5070/21/O/N/25 Question 3 part (c) · 3 marks
  6. 5070/21/O/N/25 Question 5 part (c) · 3 marks
  7. 5070/21/O/N/25 Question 6 parts (b(i)) (b(ii)) · 3 marks
  8. 5070/22/O/N/25 Question 3 part (c) · 3 marks
  9. 5070/22/O/N/25 Question 6 parts (b(i)) (b(ii)) · 3 marks
  10. 5070/41/O/N/25 Question 2 parts (d) (e) · 2 marks
  11. 5070/42/O/N/25 Question 2 parts (d) (e) · 2 marks
  12. 5070/11/M/J/25 Question 12 · 1 mark
  13. 5070/11/M/J/25 Question 13 · 1 mark
  14. 5070/12/M/J/25 Question 10 · 1 mark
  15. 5070/12/M/J/25 Question 11 · 1 mark
  16. 5070/12/M/J/25 Question 30 · 1 mark
  17. 5070/21/M/J/25 Question 4 part (c(i)) · 3 marks
  18. 5070/21/M/J/25 Question 6 parts (b) (e) · 5 marks
  19. 5070/22/M/J/25 Question 4 part (c(ii)) · 3 marks
  20. 5070/22/M/J/25 Question 6 parts (b) (e) · 5 marks
  21. 5070/41/M/J/25 Question 1 part (a(ii)) · 2 marks
  22. 5070/41/M/J/25 Question 2 parts (a) (c) (d) (e) (f) · 5 marks
  23. 5070/42/M/J/25 Question 2 parts (c) (d) (e) (f) · 4 marks
  24. 5070/11/O/N/24 Question 9 · 1 mark
  25. 5070/11/O/N/24 Question 10 · 1 mark
  26. 5070/11/O/N/24 Question 29 · 1 mark
  27. 5070/12/O/N/24 Question 9 · 1 mark
  28. 5070/12/O/N/24 Question 11 · 1 mark
  29. 5070/12/O/N/24 Question 31 · 1 mark
  30. 5070/12/O/N/24 Question 38 · 1 mark
  31. 5070/21/O/N/24 Question 5 part (c) · 3 marks
  32. 5070/21/O/N/24 Question 6 part (d) · 3 marks
  33. 5070/22/O/N/24 Question 5 part (c) · 3 marks
  34. 5070/22/O/N/24 Question 6 part (e) · 3 marks
  35. 5070/41/O/N/24 Question 2 parts (d) (e) (f(i)) (f(ii)) · 7 marks
  36. 5070/42/O/N/24 Question 2 parts (d) (e) (f) · 7 marks
  37. 5070/11/M/J/24 Question 8 · 1 mark
  38. 5070/11/M/J/24 Question 9 · 1 mark
  39. 5070/11/M/J/24 Question 10 · 1 mark
  40. 5070/11/M/J/24 Question 11 · 1 mark
  41. 5070/12/M/J/24 Question 9 · 1 mark
  42. 5070/12/M/J/24 Question 10 · 1 mark
  43. 5070/21/M/J/24 Question 3 part (a) · 3 marks
  44. 5070/21/M/J/24 Question 5 part (c) · 3 marks
  45. 5070/21/M/J/24 Question 9 part (c) · 3 marks
  46. 5070/22/M/J/24 Question 3 part (a) · 3 marks
  47. 5070/22/M/J/24 Question 5 part (c) · 3 marks
  48. 5070/22/M/J/24 Question 9 part (b) · 3 marks
  49. 5070/41/M/J/24 Question 2 part (a(iii)) · 1 mark
  50. 5070/11/O/N/23 Question 8 · 1 mark
  51. 5070/11/O/N/23 Question 9 · 1 mark
  52. 5070/11/O/N/23 Question 10 · 1 mark
  53. 5070/11/O/N/23 Question 11 · 1 mark
  54. 5070/12/O/N/23 Question 8 · 1 mark
  55. 5070/12/O/N/23 Question 9 · 1 mark
  56. 5070/12/O/N/23 Question 10 · 1 mark
  57. 5070/12/O/N/23 Question 11 · 1 mark
  58. 5070/21/O/N/23 Question 7 parts (a) (d) · 5 marks
  59. 5070/22/O/N/23 Question 7 parts (a) (c) · 5 marks
  60. 5070/41/O/N/23 Question 2 part (e) · 2 marks
  61. 5070/42/O/N/23 Question 2 part (e) · 2 marks
  62. 5070/11/M/J/23 Question 7 · 1 mark
  63. 5070/11/M/J/23 Question 8 · 1 mark
  64. 5070/11/M/J/23 Question 9 · 1 mark
  65. 5070/11/M/J/23 Question 10 · 1 mark
  66. 5070/12/M/J/23 Question 9 · 1 mark
  67. 5070/12/M/J/23 Question 10 · 1 mark
  68. 5070/12/M/J/23 Question 11 · 1 mark
  69. 5070/21/M/J/23 Question 3 part (a(i)) · 3 marks
  70. 5070/21/M/J/23 Question 4 part (e) · 2 marks
  71. 5070/21/M/J/23 Question 9 part (a) · 3 marks
  72. 5070/22/M/J/23 Question 3 part (a(i)) · 3 marks
  73. 5070/22/M/J/23 Question 4 part (e) · 2 marks
  74. 5070/22/M/J/23 Question 9 part (a) · 3 marks
  75. 5070/41/M/J/23 Question 2 parts (d) (e) (f) · 5 marks
  76. 5070/42/M/J/23 Question 2 parts (e) (f) (g) · 5 marks
  77. 5070/11/O/N/22 Question 13 · 1 mark
  78. 5070/11/O/N/22 Question 15 · 1 mark
  79. 5070/11/O/N/22 Question 16 · 1 mark
  80. 5070/11/O/N/22 Question 28 · 1 mark
  81. 5070/12/O/N/22 Question 13 · 1 mark
  82. 5070/12/O/N/22 Question 15 · 1 mark
  83. 5070/21/O/N/22 Question 3 part (e(ii)) · 1 mark
  84. 5070/21/O/N/22 Question 4 part (b) · 3 marks
  85. 5070/21/O/N/22 Question 9 part (a(i)) · 3 marks
  86. 5070/22/O/N/22 Question 3 part (e) · 2 marks
  87. 5070/22/O/N/22 Question 4 part (c) · 3 marks
  88. 5070/22/O/N/22 Question 9 part (a(i)) · 3 marks
  89. 5070/41/O/N/22 Question 5 parts (f) (g) (h) (h(i)) · 7 marks
  90. 5070/42/O/N/22 Question 5 parts (f) (g) (h) (h(i)) · 7 marks
  91. 5070/11/M/J/22 Question 14 · 1 mark
  92. 5070/11/M/J/22 Question 15 · 1 mark
  93. 5070/11/M/J/22 Question 35 · 1 mark
  94. 5070/12/M/J/22 Question 14 · 1 mark
  95. 5070/12/M/J/22 Question 15 · 1 mark
  96. 5070/21/M/J/22 Question 2 part (f) · 3 marks
  97. 5070/21/M/J/22 Question 5 part (b(iv)) · 1 mark
  98. 5070/21/M/J/22 Question 7 part (e) · 3 marks
  99. 5070/21/M/J/22 Question 8 part (d(ii)) · 3 marks
  100. 5070/21/M/J/22 Question 9 part (b(ii)) · 2 marks
  101. 5070/22/M/J/22 Question 2 part (f) · 3 marks
  102. 5070/22/M/J/22 Question 8 part (d) · 3 marks
  103. 5070/22/M/J/22 Question 9 part (d(ii)) · 3 marks
  104. 5070/42/M/J/22 Question 1 parts (c(i)) (c(ii)) (c(iii)) (c(iv)) · 5 marks
  105. 5070/11/O/N/21 Question 11 · 1 mark
  106. 5070/11/O/N/21 Question 12 · 1 mark
  107. 5070/11/O/N/21 Question 13 · 1 mark
  108. 5070/11/O/N/21 Question 25 · 1 mark
  109. 5070/12/O/N/21 Question 11 · 1 mark
  110. 5070/12/O/N/21 Question 12 · 1 mark
  111. 5070/12/O/N/21 Question 13 · 1 mark
  112. 5070/21/O/N/21 Question 3 part (c) · 2 marks
  113. 5070/21/O/N/21 Question 4 part (d) · 2 marks
  114. 5070/21/O/N/21 Question 9 part (b) · 3 marks
  115. 5070/21/O/N/21 Question 10 part (c) · 2 marks
  116. 5070/22/O/N/21 Question 3 part (c) · 2 marks
  117. 5070/22/O/N/21 Question 4 part (d) · 2 marks
  118. 5070/22/O/N/21 Question 9 part (c) · 3 marks
  119. 5070/22/O/N/21 Question 10 part (c) · 2 marks
  120. 5070/41/O/N/21 Question 4 parts (h) (h(i)) · 5 marks
  121. 5070/41/O/N/21 Question 6 part (e(ii)) · 3 marks
  122. 5070/42/O/N/21 Question 4 parts (g) (h) (h(i)) · 5 marks
  123. 5070/42/O/N/21 Question 6 part (e(ii)) · 3 marks
  124. 5070/11/M/J/21 Question 10 · 1 mark
  125. 5070/11/M/J/21 Question 11 · 1 mark
  126. 5070/12/M/J/21 Question 11 · 1 mark
  127. 5070/12/M/J/21 Question 12 · 1 mark
  128. 5070/12/M/J/21 Question 13 · 1 mark
  129. 5070/21/M/J/21 Question 2 parts (e) (f(iii)) · 5 marks
  130. 5070/21/M/J/21 Question 7 part (a) · 2 marks
  131. 5070/21/M/J/21 Question 9 parts (d(i)) (d(ii)) · 4 marks
  132. 5070/22/M/J/21 Question 2 parts (d) (e(iii)) · 5 marks
  133. 5070/22/M/J/21 Question 7 part (a) · 2 marks
  134. 5070/22/M/J/21 Question 9 parts (d(i)) (d(ii)) · 4 marks
  135. 5070/41/M/J/21 Question 5 parts (a(i)) (a(ii)) (c(ii)) (c(iii)) (c(iv)) (c(v)) (d(iii)) · 8 marks
  136. 5070/41/M/J/21 Question 6 parts (b) (c) (d) · 3 marks
  137. 5070/42/M/J/21 Question 1 part (c(ii)) · 2 marks
  138. 5070/11/O/N/20 Question 13 · 1 mark
  139. 5070/11/O/N/20 Question 15 · 1 mark
  140. 5070/11/O/N/20 Question 16 · 1 mark
  141. 5070/12/O/N/20 Question 14 · 1 mark
  142. 5070/12/O/N/20 Question 16 · 1 mark
  143. 5070/12/O/N/20 Question 17 · 1 mark
  144. 5070/21/O/N/20 Question 3 part (e) · 3 marks
  145. 5070/21/O/N/20 Question 4 part (d) · 2 marks
  146. 5070/21/O/N/20 Question 7 part (b(ii)) · 2 marks
  147. 5070/21/O/N/20 Question 8 part (a(i)) · 3 marks
  148. 5070/22/O/N/20 Question 2 parts (e(i)) (e(ii)) · 3 marks
  149. 5070/22/O/N/20 Question 4 part (d) · 3 marks
  150. 5070/22/O/N/20 Question 7 part (c(ii)) · 2 marks
  151. 5070/22/O/N/20 Question 8 part (a(i)) · 3 marks
  152. 5070/41/O/N/20 Question 6 part (b) · 1 mark
  153. 5070/42/O/N/20 Question 3 parts (f) (g) (h) (h(i)) · 7 marks
  154. 5070/42/O/N/20 Question 6 parts (f(i)) (f(ii)) · 3 marks
  155. 5070/11/M/J/20 Question 13 · 1 mark
  156. 5070/11/M/J/20 Question 14 · 1 mark
  157. 5070/11/M/J/20 Question 20 · 1 mark
  158. 5070/12/M/J/20 Question 15 · 1 mark
  159. 5070/12/M/J/20 Question 22 · 1 mark
  160. 5070/21/M/J/20 Question 5 part (c) · 3 marks
  161. 5070/21/M/J/20 Question 8 part (c(ii)) · 2 marks
  162. 5070/21/M/J/20 Question 9 part (c(ii)) · 3 marks
  163. 5070/22/M/J/20 Question 5 part (c) · 3 marks
  164. 5070/22/M/J/20 Question 7 part (c(ii)) · 2 marks
  165. 5070/22/M/J/20 Question 8 part (c) · 3 marks
  166. 5070/41/M/J/20 Question 2 parts (c(ii)) (c(iii)) (c(iv)) (c(v)) (c(vi)) · 5 marks
  167. 5070/42/M/J/20 Question 1 parts (c(i)) (c(ii)) (c(iii)) (c(iv)) · 5 marks
  168. 5070/42/M/J/20 Question 5 part (b(x)) · 1 mark

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