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
21–30 of 144
Question 21
3 marks · Easy
Answer and see the solution →A student records the volume of a sample of hydrogen gas as 1800 cm³. Answer the following:
(a)[1 mark]State the conversion factor from dm³ to cm³.
(b)[2 marks]Convert 1800 cm³ to dm³.
Question 22
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 23
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 24
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 25
1 mark · Easy
Answer and see the solution →State the molar volume of any gas at room temperature and pressure (rtp), in dm³.
Question 26
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 27
2 marks · Easy
Answer and see the solution →A gas has a volume of 4.5 dm³. Calculate its volume in cm³.
Question 28
2 marks · Normal
Answer and see the solution →A laboratory experiment produced 0.300 dm³ of oxygen gas. Convert this volume to cm³.
Question 29
4 marks · Normal
Answer and see the solution →Answer the questions about gases at room temperature and pressure (rtp).
(a)[1 mark]State the volume occupied by 1 mole of any gas at rtp in dm³.
(b)[1 mark]State the volume occupied by 1 mole of any gas at rtp in cm³.
(c)[2 marks]Is the volume occupied by 1 mole of a gas at rtp the same for all gases? Give a reason for your answer.
Question 30
3 marks · Normal
Answer and see the solution →Calculate the volume, in cm³, of 0.45 mol of helium gas at rtp. Show your working.