plumiGas volumes, molar volume and pV = nRT: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 1.2.3 Gas volumes, molar volume and pV = nRT, 2019–2025, with mark schemes and examiner’s reports where available.
Paper
All papers
Exam
All years
Calculations
Loading the question…
Open the full PDFYour answerLoading the question…
Open the full PDFYour answerQ20(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFYour answerQ24(a)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ24(a)(ii)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFQ16(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ2(d)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFYour answerLoading the question…
Open the full PDFYour answerLoading the question…
Open the full PDFYour answerQ21(b)(i)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ18(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFYour answerQ20(b)(iii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ1(c)(ii)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ13(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ19(d)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDF
All 79 questions on Gas volumes, molar volume and pV = nRT, as a list
- June 2025, AS Unit 1, Q2 (1 mark): What volume of sulfur dioxide gas reacts completely with 50 cm3 of 0.12 mol dm–3 sodium hydroxide solution? [molar volume of a gas = 24 dm3 at room temperature
- June 2025, AS Unit 1, Q11 (1 mark): What is the maximum volume of butane which will completely burn in 130 cm3 of oxygen? C4H10 + 6.5O2 → 4CO2 + 5H2O A 10 cm3 B 15 cm3 C 20 cm3 D 40 cm3
- June 2025, AS Unit 1, Q20(a) (4 marks): According to data from 2021, there are 415 ppm of carbon dioxide in the atmosphere by volume. Calculate the moles of carbon dioxide present in 1.00 m3 of air at
- June 2025, AS Unit 2, Q8 (1 mark): 20 g of an impure sample of calcium carbonate is heated and decomposes completely. 3.6 dm3 of carbon dioxide is produced at room temperature and pressure (r.t.p
- January 2025, AS Unit 1, Q24(a)(i) (4 marks): Calculate the number of moles of X in the sample. [R = 8.31 J mol–1 K–1] Use pV = nRT (4)
- January 2025, AS Unit 1, Q24(a)(ii) (1 mark): Deduce the relative molecular mass of X. (1)
- January 2025, AS Unit 2, Q16(a) (1 mark): What is the maximum volume of gas formed at 600 K and 101 000 Pa? [ pV = nRT R = 8.31 J mol–1 K–1 ] (1) A 0.025 m3 B 0.099 m3 C 0.123 m3 D 0.247 m3
- January 2025, AS Unit 3, Q2(d) (2 marks): Calculate the volume of 1 mol of hydrogen gas at r.t.p., in cm3, using your answer to (c), the reaction equation and the mass of magnesium (0.030 g) used in the
- January 2025, Unit 5, Q13 (1 mark): What are the volumes of oxygen required and carbon dioxide produced, at room temperature and pressure (r.t.p.), on complete combustion of 5.8 g of butane, C4H10
- October 2024, AS Unit 1, Q4 (1 mark): Two identical sealed flasks, containing different gases, are side by side. Each flask contains one gas, with the gases at the same temperature and pressure. Fla
- October 2024, AS Unit 1, Q7 (1 mark): This question is about the thermal decomposition of calcium nitrate. 2Ca(NO3)2 → 2CaO + 4NO2 + O2 What volume of gas is produced by the complete decomposition o
- October 2024, AS Unit 1, Q21(b)(i) (3 marks): A sample of 5.00 g of aluminium chloride was heated to 455 K at a pressure of 1.01 × 105 Pa. When all the aluminium chloride had vaporised, the final volume of
- October 2024, AS Unit 2, Q18(a) (5 marks): Calculate the relative molecular mass of liquid X. pV = nRT Gas constant R = 8.31 J K–1 mol–1 (5)
- June 2024, AS Unit 1, Q2 (1 mark): What is the maximum volume of butane that can be completely burned in 39 cm3 of oxygen at room temperature and pressure? C4H10(g) + 6.5O2(g) → 4CO2(g) + 5H2O(l)
- June 2024, AS Unit 1, Q18(b)(iii) (5 marks): Calculate the maximum volume, in cm3, of carbon dioxide gas released by the neutralisation reaction in (b)(ii) from 5.00 g of baking powder, in an oven at 190°C
- June 2024, AS Unit 1, Q18(b)(iv) (2 marks): Calculate the decrease in volume when the carbon dioxide gas is cooled to 20°C. (2)
- June 2024, AS Unit 2, Q20(b)(iii) (4 marks): 5 g samples of myrcene and limonene were completely hydrogenated. Calculate the volume of hydrogen required to hydrogenate each sample. Include the unit with yo
- June 2024, AS Unit 3, Q1(c)(ii) (3 marks): The reaction of 0.320 g of the Group 2 metal carbonate resulted in 89.0 cm3 of carbon dioxide gas being collected in the gas syringe. MCO3(s) + 2HCl(aq) → MCl2(
- June 2024, Unit 5, Q13(b) (1 mark): If 64.3 g of the amide is produced, what volume of HCl is formed at room temperature and pressure (r.t.p.)? Assume the stoichiometry is 1 : 1. 1 mole of gas occ
- June 2024, Unit 5, Q19(d) (5 marks): Poly(ethenol) is made from a polymer intermediate, rather than by polymerisation, as ethenol is unstable. The polymer intermediate is prepared from a monomer, X
- June 2024 (R), AS Unit 3, Q1(c) (2 marks): The reaction produced 29.5 cm3 of sulfur dioxide. Calculate the molar volume of sulfur dioxide, in dm3, from this result. (2)
- January 2024, AS Unit 1, Q22(a) (5 marks): Calculate the molar mass of the unknown gas. (5)
- January 2024, AS Unit 1, Q22(b) (1 mark): The unknown gas is a hydrocarbon. Give the name or formula for the unknown gas using your answer to (a). (1)
- January 2024, AS Unit 3, Q3(b) (2 marks): ‘20 volume’ hydrogen peroxide solution means that 1 dm3 of the solution produces 20 dm3 of oxygen gas when it decomposes completely. 2H2O2(aq) → 2H2O(l) + O2(g)
- October 2023, AS Unit 1, Q20(c)(ii) (3 marks): Calculate the amount, in mol, of hydrogen gas that reacted with α-bisabolene. Use the ideal gas equation, pV = nRT. [R = 8.31 J mol–1 K–1] (3)
- October 2023, AS Unit 1, Q21(c)(i) (4 marks): Calculate the relative formula mass of XSO4 , using these data. (4)
- October 2023, AS Unit 1, Q21(c)(ii) (1 mark): Deduce the identity of X, using your answer to (c)(i). (1)
- October 2023, AS Unit 3, Q2(d)(iii) (3 marks): Calculate a value for the molar volume of carbon dioxide, using your volume from (d)(ii) and the equation for the reaction. (3)
- October 2023, Unit 4, Q15(b) (3 marks): Calculate the temperature, in K, of the reaction mixture at equilibrium under these conditions. Use the equation pV = nRT and the data at the start of the quest
- October 2023, Unit 5, Q16 (1 mark): A 10 cm3 mixture of methane and argon is ignited. The methane requires 4 cm3 of oxygen for complete combustion. What is the volume of argon, in cm3, in the mixt
- October 2023, Unit 5, Q17 (1 mark): When 10 cm3 of but-1-ene, C4H8 , is ignited with excess oxygen, there is an overall decrease in volume of x cm3 . All gas volumes are measured at room temperatu
- June 2023, AS Unit 2, Q12 (1 mark): Magnesium nitrate decomposes on heating. 2Mg(NO3)2(s) → 2MgO(s) + 4NO2(g) + O2(g) A sample of magnesium nitrate decomposed completely. The total volume of gas f
- June 2023, AS Unit 2, Q22(c)(ii) (4 marks): When 5.00 cm3 of a disinfectant reacts with excess hydrogen peroxide, 113 cm3 of oxygen is produced, measured at room temperature and pressure. H2O2(aq) + NaClO
- June 2023, AS Unit 3, Q4(a)(ii) (4 marks): Calculate the value for the molar volume of hydrogen under these conditions, using the student’s results. Give your answer to an appropriate number of significa
- June 2023, Unit 5, Q21(c)(ii) (3 marks): Hg(CNO)2 decomposes as shown. 3Hg(CNO)2(s) → Hg(CN)2(s) + 2Hg(s) + 2CO2(g) + 2CO(g) + 2N2(g) Calculate the total volume, in cm3, of gas produced when 1.00 g of
- January 2023, AS Unit 1, Q4 (1 mark): What is the pressure when 5.00 mol of nitrogen in a container with a volume of 1.50 m3 is heated to 500 K? [ pV = nRT R = 8.31 J K–1 mol–1] A 13.9 Pa B 6 290 Pa
- January 2023, AS Unit 1, Q23(b)(i) (2 marks): Dry air contains 21.0 % oxygen by volume. The average human breath has a volume of 500 cm3. Calculate the volume of air, in dm3, that would have to pass over th
- January 2023, AS Unit 1, Q23(c)(i) (4 marks): Calculate the volume of gas, in m3, measured at room temperature and pressure (r.t.p.) that can be obtained from a bottle containing 13.9 dm3 of liquid oxygen.
- January 2023, AS Unit 1, Q23(c)(ii) (1 mark): The total mass of the bottle is 80.0 kg when it is full of oxygen. Calculate the mass of an empty bottle, using your working from (c)(i). Give your answer to an
- January 2023, AS Unit 1, Q23(c)(iii) (2 marks): Explain why the container needs to have such a large mass. (2)
- January 2023, AS Unit 2, Q18(c)(ii) (3 marks): Calculate the volume of Cl2, at room temperature and pressure, needed to make the mass of Ca(ClO)2 calculated in (c)(i). (3)
- January 2023, Unit 5, Q9 (1 mark): What is the minimum volume, in cm3 , of oxygen needed for the complete combustion of a mixture of 50 cm3 of propene and 50 cm3 of but-1-ene gases? All gas volum
- January 2023, Unit 5, Q20(b)(ii) (2 marks): Manganese(IV) oxide catalyses the decomposition of hydrogen peroxide. 2H2O2(aq) → 2H2O(aq) + O2(g) 100 cm3 of a solution of hydrogen peroxide decomposed to prod
- October 2022, AS Unit 1, Q6(b) (1 mark): A mixture of 40 cm3 of butane and 20 cm3 of oxygen reacts in a sealed system to form carbon monoxide and hydrogen. What is the total volume of gas in the system
- October 2022, AS Unit 1, Q15(d)(ii) (4 marks): A sample of compound X has a mass of 0.267 g and vaporises at 85.0 °C and 104 kPa to produce a gaseous sample with a volume of 98.0 cm3. Calculate the molar mas
- October 2022, AS Unit 1, Q16(e)(i) (1 mark): Calculate the number of moles of carbon dioxide formed. (1)
- October 2022, AS Unit 2, Q23(e) (5 marks): Many cyclists carry a small cylinder of carbon dioxide to inflate their inner tube if it is punctured. The carbon dioxide is stored under pressure. valve carbon
- October 2022, Unit 5, Q21(a)(i) (4 marks): Show by calculation that the molar mass of coniine is 127 g mol−1. (4)
- June 2022, AS Unit 1, Q22(d)(ii) (4 marks): 2.0 mol of zingiberene react completely with hydrogen at 150 °C and a pressure of 120 kPa. Calculate the minimum volume of hydrogen needed under these condition
- June 2022, AS Unit 1, Q23(a)(iii) (3 marks): One tonne of landfill waste produces approximately 12.5 dm3 of landfill gases per day. Calculate the mass of carbon dioxide produced in a year by a typical land
- June 2022, AS Unit 2, Q10(b) (1 mark): A bottle of hydrogen peroxide is labelled as ‘10 volume’. This means that 1 cm3 of hydrogen peroxide solution decomposes to produce 10 cm3 oxygen at room temper
- June 2022, AS Unit 2, Q15(b)(i) (3 marks): The gas syringe can measure a maximum of 100 cm3 of gas. Calculate the maximum volume of 0.500 mol dm−3 hydrochloric acid that can be added to excess calcium ca
- January 2022, AS Unit 1, Q21(c)(iv) (3 marks): In an experiment, 0.050 mol of alpha-ocimene reacted with 3.6 dm3 of hydrogen, H2 , in the presence of a catalyst. Deduce the structure of the product of this r
- January 2022, AS Unit 1, Q24(a) (4 marks): Calculate the molar mass of C. [ pV = nRT R = 8.31 J mol−1 K−1 ] (4)
- January 2022, AS Unit 2, Q24(g)(ii) (3 marks): The chemical reactions in the exhaust system of a diesel car, using a catalytic converter, form 89.3 m3 of nitrogen per hour. Calculate the number of molecules
- January 2022, Unit 5, Q13(b)(ii) (6 marks): Calculate the final oxidation state of the cerium ion formed in the reaction. (6)
- October 2021, AS Unit 1, Q1(b) (1 mark): 3.2 kg of this diesel fuel is burned in air. What is the maximum volume, in dm3, of sulfur dioxide which can be produced, measured at room temperature and press
- October 2021, AS Unit 1, Q4(b) (1 mark): What is the maximum volume, in cm3, of hydrogen which could be formed, measured at r.t.p.? [Molar volume of a gas at r.t.p. = 24 dm3 mol−1] (1) A 120 B 240 C 48
- October 2021, AS Unit 1, Q13(d) (4 marks): Carbon dioxide is a gas at room temperature. A fizzy drink is canned at 5.0 °C and 1.3 × 105 Pa and contains approximately 3 g of carbon dioxide. Calculate the
- October 2021, AS Unit 1, Q15(e)(i) (3 marks): Butane is used as a fuel. The equation for the complete combustion of butane is shown. 2C4H10(g) + 13O2(g) → 8CO2(g) + 10H2O(l) 35.0 cm3 butane is completely bu
- June 2021, AS Unit 1, Q16 (1 mark): Which of these gases occupies 6.0 dm3 at room temperature and pressure (r.t.p.)? [molar volume of gas at r.t.p. = 24.0 dm3 mol−1 Ar values: He = 4.0 C = 12.0 N
- June 2021, AS Unit 1, Q18 (1 mark): Propane burns completely in oxygen as shown. C3H8(g) + 5O2(g) → 3CO2(g) + 4H2O(l) 100 cm3 of propane was mixed with 600 cm3 of oxygen and the mixture was ignite
- June 2021, AS Unit 1, Q23(f) (4 marks): 0.0100 mol of an alkene reacts completely with exactly 600 cm3 of hydrogen gas, measured at 298 K and 1.24 × 105 Pa pressure, to form an alkane. Use the ideal g
- June 2021, AS Unit 2, Q17 (1 mark): What volume, in dm3, of hydrogen gas will be produced when 3.00 g of lithium is reacted with water at room temperature and pressure (r.t.p.)? 2Li + 2H2O → 2LiOH
- June 2021, Unit 5, Q17 (1 mark): What is the minimum volume of oxygen gas, measured at room temperature and pressure, required for the complete combustion of 9.2 g of C3H8O3 (Mr = 92)? [Molar v
- June 2021, Unit 5, Q19(a)(ii) (4 marks): When 0.493 g of X was vaporised, 157 cm3 of dry air was displaced, measured at 15°C and 103 000 Pa. Calculate the molar mass of X, using the ideal gas equation.
- January 2021, AS Unit 1, Q21(c)(iii) (4 marks): A reactor at 200°C contains 8500 mol of liquid squalene, and hydrogen gas at a pressure of 4.0 × 105 Pa. Under these conditions, the complete hydrogenation of s
- January 2021, AS Unit 2, Q15 (1 mark): Magnesium nitrate decomposes on heating. 2Mg(NO3)2 → 2MgO + 4NO2 + O2 What is the total volume of gas formed at room temperature and pressure (r.t.p.) when 0.00
- January 2021, AS Unit 3, Q3(b)(i) (3 marks): Using the results of the experiment identify the Group 2 metal. [Molar volume of gas at room temperature and pressure = 24.0 dm3 mol−1 ] (3)
- January 2021, Unit 5, Q22(a) (3 marks): Determine the molecular formula of CxHy . You must show your working. (3)
- October 2020, AS Unit 1, Q19(b) (4 marks): When 0.00100 mol of ammonium dichromate(VI) was heated, 25.2 cm3 of nitrogen gas, measured at laboratory temperature, was formed. Calculate the temperature in t
- October 2020, AS Unit 2, Q11(a) (1 mark): What is the total volume (at r.t.p.) of carbon dioxide formed? [Mr(MgCO3) = 84.3 Molar volume of a gas at r.t.p. = 24.0 dm3 mol–1] (1) A 2.40 dm3 B 1.20 dm3 C 2
- October 2020, Unit 5, Q23(a) (4 marks): A mixture of methane and ethane with a total volume of 25.0 cm3 required 65.0 cm3 of oxygen for complete combustion. All gas volumes were measured at the same t
- January 2020, AS Unit 1, Q21(b) (5 marks): Ethene is used commercially to speed up the ripening of bananas. Ethene levels of 100 parts per million (ppm) are used in ripening rooms. Calculate the amount,
- January 2020, AS Unit 2, Q12(a) (1 mark): What is the final volume of the mixture of gases in dm3 at r.t.p.? (1) A 9.60 B 11.2 C 21.6 D 23.2
- January 2020, AS Unit 2, Q12(b) (1 mark): If the final mixture of gases is passed through a U-tube containing sodium hydroxide, what is the final volume of gas in cm3? (1) A 0.0 B 1600 C 9600 D 12000 Us
- June 2019, AS Unit 1, Q24(b) (6 marks): A passenger airbag requires 120 dm3 of gas to fill it. Calculate, using the ideal gas equation, the mass of sodium azide required to fill a passenger airbag in
- January 2019, AS Unit 1, Q20 (1 mark): What is the maximum volume of hydrogen formed, at room temperature and pressure (r.t.p.), when 0.207 g of lithium is added to excess water? 2Li(s) + 2H2O(l) o 2
- January 2019, AS Unit 1, Q22(b)(iii) (4 marks): A sample of nitrogen gas occupied 108 cm3 at a temperature of 25 °C and a pressure of 1.36 × 105 Pa. Using the ideal gas equation, calculate the number of moles
Questions, mark schemes and examiner’s reports are © Pearson Edexcel, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Edexcel International A Level Chemistry past papers.
The Plumi iPad app also offers exam-style questions with AI feedback on your handwritten working.