Question detail
What is the volume of 2 moles of oxygen gas (O2) 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. 48 dm3
- B. 24 dm3
- C. 12 dm3
- D. 36 dm3
Answer
48 dm3
Explanation
At room temperature and pressure, one mole of gas occupies 24 dm3. Therefore, 2 moles occupy 2 x 24 dm3 = 48 dm3.
Common mistake
Misunderstanding Volume Calculation
Students often forget to use the correct mole ratios from the balanced equation when calculating the volumes of gaseous reactants and products.
Always refer to the coefficients in the balanced equation to determine the correct mole ratios before calculating the volumes.
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