Question detail
What volume of carbon dioxide gas (CO2) is produced from the complete combustion of 8 g of propane (C3H8)? The relative formula mass (Mr) of CO2 is 44 g/mol and the balanced equation is C3H8 + 5 O2 → 3 CO2 + 4 H2O.
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 volumes of gases (chemistry only) (HT only)
Question
What volume of carbon dioxide gas (CO2) is produced from the complete combustion of 8 g of propane (C3H8)? The relative formula mass (Mr) of CO2 is 44 g/mol and the balanced equation is C3H8 + 5 O2 → 3 CO2 + 4 H2O.
Answer
The answer is 6 g.
Explanation
This uses Moles From Mass because the objective is about (chemistry only) (HT only) Calculate the volume of a gas at room temperature and pressure from its mass and relative formula mass. The reasoning belongs to Gas volumes and amount of substance within Use of amount of substance in relation to volumes of gases (chemistry only) (HT only), 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 chemistry only to keep the answer aligned with AQA GCSE Chemistry 8462 Unit 4.3.
Common mistake
Incorrect Volume Calculation
Students often forget to convert the mass of the gas into moles before calculating the volume, leading to incorrect results.
Always use the formula to convert mass to moles first, then apply the gas volume formula at room temperature and pressure.
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