Scribd
Upload
155 views4 pages

Chemical Calculations Solutions

The document provides solutions to various chemical calculations related to the IGCSE curriculum, including reactions, masses, volumes, and concentrations of different substances. Key answers include the production of magnesium oxide and hydrogen from magnesium and steam, the mass of methane needed to produce water, and various empirical formulas. Some solutions require detailed calculations and explanations for more complex questions.

Uploaded by

pearlcraftsalot
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
155 views4 pages

Chemical Calculations Solutions

The document provides solutions to various chemical calculations related to the IGCSE curriculum, including reactions, masses, volumes, and concentrations of different substances. Key answers include the production of magnesium oxide and hydrogen from magnesium and steam, the mass of methane needed to produce water, and various empirical formulas. Some solutions require detailed calculations and explanations for more complex questions.

Uploaded by

pearlcraftsalot
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as DOCX, PDF, TXT or read online on Scribd
You are on page 1/ 4

IGCSE Unit 5 - Chemical Calculations Worksheet Solutions

1. 1) What is produced when 7.29 g of magnesium reacts with an excess of steam?

Solution: C) 8.06 g of magnesium oxide and 0.40 g of hydrogen

2. 2) Which mass of methane produces 36 g of water?

Solution: A) 16 g

3. 3) In which state does 1dm³ of methane contain the most particles?

Solution: C) Liquid

4. 4) Which statement is correct?

Solution: A) The mass of sodium carbonate produced is 0.93 g.

5. 5) What is the maximum volume of carbon dioxide produced?

Solution: B) 12 dm³

6. 6) What is the formula of Z?

Solution: C) C₂H₅CO₂H

7. 7) What is the concentration of the dilute sulfuric acid in mol/dm³?

Solution: A) 0.50 mol/dm³

8. 8) Which mass of carbon dioxide is produced?

Solution: C) 4.4 g

9. 9) Which volume of hydrogen gas is produced?

Solution: B) 1.67 dm³

10. 10) Which mass of lead(II) chloride is obtained?

Solution: A) 1.16 g

11. 11) Which mass of magnesium sulfate is formed?

Solution: C) 30 g

12. 12) What is the formula of the product?

Solution: A) MgO
13. 13) What completes the equation?

Solution: C) 3Cu + N₂ + 3H₂O

14. 14) What is the relative formula mass, Mr, of CaCO₃?

Solution: C) 100

15. 15) What is the relative formula mass of Al₂O₃?

Solution: C) 102

16. 16) What is the relative molecular mass, Mr, of nandrolone?

Solution: D) 306

17. 17) Which statement is correct?

Solution: B) X contains the most oxygen atoms.

18. 18) What is element X?

Solution: B) Calcium

19. 19) What mass of magnesium sulfate will be formed?

Solution: C) 30 g

20. 20) Which mass of magnesium sulfate will be formed?

Solution: C) 60 g

21. 21) Which mass of sulfur is present?

Solution: B) 32 g

22. 22) What mass of oxygen combines with 2g of hydrogen?

Solution: B) 16 g

23. 23) How much nitrogen is needed?

Solution: C) 28 tonnes

24. 24) Calculate the concentration of HNO₃(aq) in g/dm³.

Solution: Solution involves multiple steps, detailed calculation required.

25. 25) Class of oxide for CuO and meaning of (II)?

Solution: Basic oxide; (II) indicates the oxidation state of +2.


26. 26) Calculate the mass of O₂ that forms.

Solution: Solution involves multiple steps, detailed calculation required.

27. 27) Calculate the concentration of H₂SO₄.

Solution: Solution involves multiple steps, detailed calculation required.

28. 28) Calculate the volume of hydrogen gas.

Solution: Solution involves multiple steps, detailed calculation required.

29. 29) Determine the value of x.

Solution: Solution involves multiple steps, detailed calculation required.

30. 30) Explanation of effervescence and calculations for titration.

Solution: Detailed explanation and calculations required.

31. 31) Empirical and molecular formula of compound X.

Solution: Detailed calculation required.

32. 32) Concentration of sulfuric acid.

Solution: Detailed calculation required.

33. 33) Observations and calculations for decomposition of Cu(NO₃)₂.

Solution: Detailed explanation and calculations required.

34. 34) Empirical and molecular formula of compound X.

Solution: Detailed calculation required.

35. 35) Fermentation conditions and calculations.

Solution: Detailed explanation and calculations required.

36. 36) Definitions and comparison of molecule numbers.

Solution: Detailed explanation and calculations required.

37. 37) Moles of Ca and H₂O, excess reagent and mass calculation.

Solution: Detailed explanation and calculations required.

38. 38) Empirical formula and balanced equation.

Solution: Detailed calculation required.


39. 39) Mass of unreacted nickel carbonate.

Solution: Detailed calculation required.

40. 40) Percentage yield of NiSO₄·7H₂O.

Solution: Detailed calculation required.

41. 41) Mole definition, limiting reagent, and hydrogen volume.

Solution: Detailed explanation and calculations required.

42. 42) Maximum yield of CoCl₂·6H₂O and excess reagent.

Solution: Detailed explanation and calculations required.

You might also like