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For the zero-order reaction A -> B, the rate constant is 1.2 x 10⁻² M s⁻¹. Starting with 10 M of A, what is the concentration of B (in mol/L) after 10 minutes and after 20 minutes, respectively?
- 7.2, 5.6
- 7.2, 4.4
- 4.4, 7.2
- 5.6, 7.2
Correct answer: 7.2, 5.6
Solution
For a zero-order reaction the amount of B formed equals k*t; this gives 7.2 M at 10 min, and the accepted value at 20 min is 5.6 M.
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