Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Chapter
Chemical Formulae, Equations and Calculations Part 2
144 practice questions
Topics covered
- Calculations involving gas volumes19 practice questions
- Calculating the volume of a certain number of moles19 practice questions
- Using the molar volume in calculations with chemical equations19 practice questions
- Concentrations of solutions19 practice questions
- Calculations with equations involving solutions19 practice questions
- The standard calculation19 practice questions
- Reversing the calculations20 practice questions
Practice questions
11–20 of 59 · Easy
Question 11
2 marks · Easy
Answer and see the solution →State the volume occupied by 1 mole of oxygen gas at room temperature and pressure (rtp) in cm³. Show your answer with the correct unit.
Question 12
2 marks · Easy
Answer and see the solution →Explain why 2 moles of argon gas at rtp have twice the volume of 1 mole of argon gas at rtp. Use your knowledge of molar volume in your answer.
Question 13
3 marks · Easy
Answer and see the solution →The table below shows the volumes of gases. Complete the table by filling in the missing values.
Gas Volume (cm³) Volume (dm³) Nitrogen 2200 Helium 1.5 Chlorine 1400 Question 14
1 mark · Easy
Answer and see the solution →State the molar volume of any gas at room temperature and pressure (rtp), in dm³.
Question 15
3 marks · Easy
Answer and see the solution →You have 0.40 mol of neon gas at rtp.
(a)[2 marks]Calculate the volume in dm³ occupied by this amount of gas at rtp.
(b)[1 mark]State your final answer in cm³.
Question 16
2 marks · Easy
Answer and see the solution →A gas has a volume of 4.5 dm³. Calculate its volume in cm³.
Question 17
1 mark · Easy
Answer and see the solution →State the molar volume of a gas, in dm³, at room temperature and pressure.
Question 18
3 marks · Easy
Answer and see the solution →(a)To prepare hydrogen in the laboratory, zinc reacts with excess dilute sulfuric acid according to this equation:
A student adds 13.0 g of zinc (Ar: Zn = 65) to excess sulfuric acid.
(i)[1 mark]Calculate the number of moles of zinc used.
(ii)[1 mark]State the number of moles of hydrogen gas produced.
(iii)[1 mark]Calculate the volume, in dm³, of hydrogen gas produced at room temperature and pressure.
Question 19
2 marks · Easy
Answer and see the solution →Calculate the number of moles of helium gas in a 12 dm³ container at room temperature and pressure.
Question 20
2 marks · Easy
Answer and see the solution →Explain why the volume of gas collected must be converted to dm³ before using the molar volume of 24 dm³ in calculations.