The Mole and the Avogadro Constant

The Mole and the Avogadro Constant Quiz

Spec 3.3 · Cambridge IGCSE Chemistry: Quiz

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5 questions, one answer each

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  1. 1. What is the Avogadro constant?

    • A. 6.02 × 10²³ particles per mole
    • B. 6.02 × 10²⁴ particles per mole
    • C. 6.02 × 10²² particles per mole
    • D. 6.02 × 10²⁵ particles per mole

  2. 2. Calculate the number of moles in 32 g of oxygen gas (O₂). (Relative atomic mass: O = 16)

    • A. 0.5 mol
    • B. 1.0 mol
    • C. 2.0 mol
    • D. 4.0 mol

  3. 3. What is the concentration in mol/dm³ of a solution containing 2.5 moles of sodium chloride dissolved in 500 cm³ of water?

    • A. 0.5 mol/dm³
    • B. 5.0 mol/dm³
    • C. 2.5 mol/dm³
    • D. 1.25 mol/dm³

  4. 4. A student burns 2.4 g of magnesium completely in oxygen to form magnesium oxide. Calculate the mass of magnesium oxide produced. (Relative atomic masses: Mg = 24, O = 16)

    • A. 2.4 g
    • B. 3.2 g
    • C. 4.0 g
    • D. 5.6 g

  5. 5. A sample of calcium carbonate contains 6.02 × 10²⁴ oxygen atoms. Calculate the mass of calcium carbonate in the sample. (Relative atomic masses: Ca = 40, C = 12, O = 16)

    • A. 50 g
    • B. 100 g
    • C. 150 g
    • D. 200 g

Quiz