The mole and molar mass

The mole and molar mass Quiz

Edexcel A-Level Chemistry: Quiz

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5 questions, one answer each

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  1. 1. How many molecules are in 0.250 mol of water?

    • A. 1.51 × 10²³
    • B. 6.02 × 10²³
    • C. 2.41 × 10²⁴
    • D. 4.17 × 10⁻²⁵

  2. 2. What is the amount of substance in 11.0 g of CO₂ (M = 44.0 g mol⁻¹)?

    • A. 4.00 mol
    • B. 0.500 mol
    • C. 484 mol
    • D. 0.250 mol

  3. 3. A compound contains C and H in the mole ratio 1 : 1.5. Its empirical formula is:

    • A. CH
    • B. C₂H₃
    • C. C₃H₂
    • D. CH₂

  4. 4. Which volume should be used in pV = nRT for 250 cm³?

    • A. 250 m³
    • B. 0.250 m³
    • C. 2.50 × 10⁻⁴ m³
    • D. 2.50 × 10⁻⁶ m³

  5. 5. A compound has empirical formula CH₂ and M = 56 g mol⁻¹. Its molecular formula is:

    • A. C₂H₄
    • B. C₃H₆
    • C. C₄H₈
    • D. C₅H₁₀

Quiz