Question detail
Calculate the number of particles in 2 moles of a substance using the Avogadro constant.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Amount of substance
Question
- A. 1.2 x 10^24 particles
- B. 3.0 x 10^23 particles (A-level cue 730b878c distractor 1)
- C. 6.02 x 10^23 particles (A-level cue 730b878c distractor 2)
- D. 1.2 x 10^23 particles (A-level cue 730b878c distractor 3)
Answer
1.2 x 10^24 particles
Explanation
The correct option is 1.2 x 10^24 particles. 1.2 x 10^24 particles is correct because it supports the objective: Explain the Avogadro constant as the number of particles in one mole.. The reasoning stays within The mole and the Avogadro constant and avoids drifting into a similar A-Level Chemistry idea. This item is treated as conceptual revision rather than a formal calculation item because the validated answer is an explanation or option choice, not a worked numerical response.
Common mistake
Misunderstanding the Avogadro Constant
Students often confuse the Avogadro constant with the number of moles instead of recognizing it as the number of particles in one mole.
To clarify, remember that the Avogadro constant (6.022 x 10^23) represents the number of atoms, molecules, or ions in one mole of a substance. When calculating the number of particles, use the formula: number of particles = moles × Avogadro constant. For example, if you have 2 moles of a substance, the calculation would be: 2 moles × 6.022 x 10^23 particles/mole = 1.2044 x 10^24 particles.
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