Question detail
A gas syringe collects 48 cm3 of gas in 16 s. Which mean rate calculation is correct?
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
MCQ
Type
practice
Style
Topic
Rate of reaction
Question
- A. 48 ? 16 = 3 cm3/s
- B. 16 ? 48 = 0.33 cm3/s
- C. 48 ? 16 = 768 cm3/s
- D. 48 ? 16 = 32 cm3/s
Answer
The answer is 48 ? 16 = 3 cm3/s.
Explanation
The correct option is "48 ? 16 = 3 cm3/s" because mean rate is change in gas volume divided by time. The distractors invert the calculation, multiply the values, or subtract instead of dividing.
Common mistake
Confusing Rate Calculation
Students often confuse the calculation of rate by using the wrong quantity (e.g., using mass instead of gas volume or vice versa).
Ensure to identify whether you are measuring the change in mass or gas volume and use the appropriate quantity in your rate calculation.
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