Question detail
What mass of carbon dioxide (CO2) is produced when 3 moles of propane (C3H8) are burned in excess oxygen according to the balanced equation: C3H8 + 5O2 → 3CO2 + 4H2O?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Use of amount of substance in relation to masses of pure substances
Question
What mass of carbon dioxide (CO2) is produced when 3 moles of propane (C3H8) are burned in excess oxygen according to the balanced equation: C3H8 + 5O2 → 3CO2 + 4H2O?
Answer
The answer is 132 g.
Explanation
This uses Moles From Mass because the objective is about (HT only) Calculate masses of substances shown in a balanced symbol equation. The reasoning belongs to Amounts of substances in 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.
Common mistake
Confusing Mass and Moles
Students often confuse the mass of a substance with the number of moles when calculating masses from a balanced symbol equation.
To fix this, remember to use the relative formula mass to convert between mass and moles correctly, ensuring you apply the correct formula.
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