Question detail
For Moles (HT only), which option best supports this Unit 4.3 objective: (HT only) Define the Avogadro constant as the number of atoms, molecules or ions in one mole of a substance?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Use of amount of substance in relation to masses of pure substances
Question
- A. 117 g
- B. 58.5 g
- C. 29.25 g
- D. 145 g
Answer
The answer is 117 g.
Explanation
The correct option is 117 g. This uses Moles From Mass because the objective is about (HT only) Define the Avogadro constant as the number of atoms, molecules or ions in one mole of a substance. The reasoning belongs to Moles (HT only) within Use of amount of substance in relation to masses of pure substances, so it should not be confused with nearby quantitative ideas such as mass, moles, concentration, yield, atom economy, or gas volume unless those are named in the objective. Use the focus term HT only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3. The other options are weaker because they either use the wrong formula, the wrong unit, a vague relationship, or the wrong quantitative context.
Common mistake
Confusing Avogadro's Constant
Students often confuse the Avogadro constant with the number of particles in a specific mass of a substance instead of understanding it as a fixed number of particles in one mole.
Remember that Avogadro's constant (6.02 x 10^23) represents the number of atoms, molecules, or ions in one mole of any substance, regardless of its mass.
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