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UPCAT Science practice question 18: Approximately how many particles are in one mole of a substance?

Correct answer

B. 6.02 × 10²³

This is Avogadro's number. The other values are the speed of light order of magnitude, the elementary charge, and the electron mass.

Approximately how many particles are in one mole of a substance?

  1. 3.14 × 10⁸
  2. 6.02 × 10²³Correct
  3. 1.60 × 10⁻¹⁹
  4. 9.11 × 10⁻³¹

Why B is correct

This is Avogadro's number. The other values are the speed of light order of magnitude, the elementary charge, and the electron mass.

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