Question detail
Which unit is commonly used to express the rate of reaction?
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. g/s
- B. g
- C. m/s
- D. kg
Answer
g/s
Explanation
The correct answer is g/s. This is correct because it matches the rate of reaction, reversible reaction, equilibrium, catalyst, or Le Chatelier concept tested by this approved Chemistry 8462 learning objective. The other options are incorrect because they change the quantity, unit, condition, graph interpretation, or chemical relationship in the question.
Common mistake
Misidentifying the rate unit
Students often write the rate of reaction as g s⁻¹ or mol s⁻¹ but forget to include the correct unit for the quantity used (e.g. g s⁻¹ for mass change, cm³ s⁻¹ for volume change, or mol s⁻¹ for moles).
Always pair the rate with the appropriate unit that matches the measured quantity: if you are using mass, use g s⁻¹; if volume, use cm³ s⁻¹; if moles, use mol s⁻¹. Write the unit as a fraction (e.g., g s⁻¹) rather than a product (g s).
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