Question detail
Calculate the volume of 0.5 moles of a gas at room temperature and pressure.
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 volumes of gases (chemistry only) (HT only)
Question
- A. 12 dm3
- B. 6 dm3
- C. 24 dm3
- D. 18 dm3
Answer
The correct answer multiplies the amount of gas in moles by 24 dm3 per mole, giving a final volume in dm3 at room temperature and pressure. This answer should be checked against the named quantitative relationship, the balanced equation where relevant, and the final unit required by the question.
Explanation
This is a gas-volume question. The constant 24 dm3 applies to one mole of gas at room temperature and pressure, so the method is amount × 24. A common error is to divide by 24 or to report the answer in cm3 without converting; if cm3 is required, convert dm3 to cm3 by multiplying by 1000.
Common mistake
Volume Calculation Mistake
Students often forget that one mole of gas occupies 24 dm3 at room temperature and pressure, leading to incorrect volume calculations.
Always remember to use the fact that one mole of any gas at room temperature and pressure occupies 24 dm3 when calculating gas volumes.
Related flashcards
Flashcard 1 of 5
Related practice questions
Question 1 of 5
Choose an answer, get feedback, then move sideways through the set.