Pearson Edexcel International GCSE (9–1) · CHEMISTRY · Unit
Principles of Chemistry
991 practice questions
Topics covered
- States of Matter102 practice questions
- Elements, Compounds and Mixtures69 practice questions
- Atomic Structure108 practice questions
- The Periodic Table103 practice questions
- Chemical Formulae, Equations and Calculations Part 119 practice questions
- Chemical Formulae, Equations and Calculations Part 2144 practice questions
- Ionic Bonding143 practice questions
- Covalent Bonding68 practice questions
- Metallic Bonding19 practice questions
- Electrolysis198 practice questions
Practice questions
401–410 of 991
Question 401
2 marks · Hard
Answer and see the solution →Write the balanced chemical equation, including state symbols, for the reaction of solid sodium with water to form aqueous sodium hydroxide and hydrogen gas.
Question 402
1 mark · Easy
Answer and see the solution →State the volume, in dm³, occupied by one mole of any gas at room temperature and pressure (rtp).
Question 403
3 marks · Easy
Answer and see the solution →Hydrogen peroxide decomposes to form water and oxygen gas as shown:
(a)[1 mark]Write the stoichiometric ratio between hydrogen peroxide and oxygen in the equation above.
(b)[2 marks]Calculate the volume, in dm³, of oxygen gas produced at rtp from complete decomposition of 0.50 mol of hydrogen peroxide.
Question 404
2 marks · Easy
Answer and see the solution →Calculate the volume, in dm³, of 0.75 moles of carbon dioxide gas at room temperature and pressure (rtp).
Question 405
3 marks · Easy
Answer and see the solution →A student collects three different gases at rtp in three identical flasks. Data for the gases is shown below:
Volumes and types of gas collected at rtp Gas Volume collected (dm³) Moles collected Argon 1.0 ? Oxygen 0.5 ? Hydrogen 2.0 ? (a)[1 mark]Calculate the number of moles of argon collected.
(b)[1 mark]Calculate the number of moles of oxygen collected.
(c)[1 mark]Which gas sample contains the largest number of molecules? Explain your answer.
Question 406
1 mark · Easy
Answer and see the solution →What is the formula used to calculate the volume of a given amount of gas, in moles, at rtp?
Question 407
3 marks · Easy
Answer and see the solution →Methane combusts in oxygen according to the equation:
A sample of methane of volume 2.4 dm³ is burned completely in excess oxygen at rtp.
(a)[1 mark]Calculate the number of moles of methane in the sample.
(b)[2 marks]Calculate the volume, in dm³, of carbon dioxide gas produced at rtp.
Question 408
2 marks · Easy
Answer and see the solution →Calculate the volume, in dm³, of 3.0 moles of nitrogen gas at room temperature and pressure (rtp).
Question 409
2 marks · Easy
Answer and see the solution →Two balloons are filled with different gases at room temperature and pressure (rtp): one has 48 dm³ of helium (He), and the other has 48 dm³ of methane (CH₄).
Explain whether the two balloons contain the same number of particles. Give a reason for your answer.
Question 410
2 marks · Normal
Answer and see the solution →Calculate the volume, in dm³, of 0.25 moles of nitrogen gas, N₂, at room temperature and pressure (rtp).