Chemistry Class 10 Chapter 3: Chemical Calculations (Stoichiometry)

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• Class 10
• Chemistry
• Chapter 3
• FBISE SSC-II

Chapter summary

Chapter 3 of Chemistry for Class 10 is called "Chemical Calculations (Stoichiometry)". It covers 4 learning outcomes of the Federal Board syllabus. You will learn to: use the molar gas volume, 24 dm3 at room temperature and pressure, in calculations; define concentration, use both g/dm3 and mol/dm3 and convert them.. Parhayi.com has 139 MCQs, 35 short questions and 17 long questions for this chapter.

Topics in this chapter

• Use the molar gas volume, 24 dm3 at room temperature and pressure, in calculations…
• Define concentration, use both g/dm3 and mol/dm3 and convert them.
• Calculate stoichiometric relationships between substances: reacting masses, volumes of…
• Calculate empirical formula and molecular formula from appropriate data.

Sample questions

Try these questions from the chapter. The answers are for Premium students.

1. Calculate the concentration in mol/dm³ of a solution containing 20 g of NaOH in 1 dm³ of solution. (3 marks)
2. 10 g of calcium carbonate is heated strongly: CaCO₃ → CaO + CO₂. Calculate the mass of CaO and the volume of CO₂ at RTP produced. (Ca = 40, C = 12, O = 16) (3 marks)
3. Calculate the volume of hydrogen at RTP produced when 13 g of zinc reacts with excess dilute sulphuric acid. Zn + H₂SO₄ → ZnSO₄ + H₂ (Zn = 65) (3 marks)

What Premium gives you in this chapter

• 139 MCQs with answers and explanations
• 35 short questions with full answers
• 17 long questions with answers
• 11 Learn cards
• 23 Activities and games
• chapter tests that show your weak topics

Chemistry is the study of matter and how it changes. Learn the definitions first, then practise equations, balancing and numericals until they feel easy.