Question detail

Calculate the number of moles in 100 grams of sodium chloride (NaCl) (A-level cue 22a3411c focus)

Try the question, check the answer, then read the explanation to understand the curriculum point.

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At a glance

MCQ

Type

practice

Style

Topic

Amount of substance

Question

A. 1.0 moles
B. 0.5 moles (A-level cue 22a3411c distractor 1)
C. 1.5 moles (A-level cue 22a3411c distractor 2)
D. 2.0 moles (A-level cue 22a3411c distractor 3)

Answer

1.0 moles

Explanation

The correct option is 1.0 moles. 1.0 moles 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 version is uniquely anchored to The mole and the Avogadro constant. Retrieval anchor: A-level cue 22a3411c. 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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