Question detail
For Using moles to balance equations (HT only), which option best supports this Unit 4.3 objective: (HT only) Avoid confusing mole ratios with mass ratios when balancing equations from data?
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. 2.78 mol
- B. 1.39 mol
- C. 0.56 mol
- D. 3.00 mol
Answer
The answer is 2.78 mol.
Explanation
The correct option is 2.78 mol. This uses Moles From Mass because the objective is about (HT only) Avoid confusing mole ratios with mass ratios when balancing equations from data. The reasoning belongs to Using moles to balance equations (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 Ratios
Students often confuse mole ratios with mass ratios when balancing equations, leading to incorrect calculations.
To avoid this mistake, always identify whether you are working with moles or masses and use the correct ratios from the balanced equation.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.