The following gas phase reaction 2A3 BC..was conducted in a 1-L container with a

Question

The following gas phase reaction 2A3 BC..was conducted in a 1-L container with an initial concentration of A of 0.400 M. This reaction was found to be zero order in A and to have a half-life of 2 hr. 30. What is the rate constant with the correct units (if any)? 4) 10.0 hr 5) 0.100 5) 0.266 5) 0.133 1) 0.100 hr 20.100 M/hr 3) 10.0 M-1 .hr 31. How many hours will it take for the reaction to reach a concentration of A which is 0.133 M? 1) 2.67 2) 5.33 3) 3.00 4) 0.333 32. What will the molarity of B be after one half-life has passed? 1) 0.200 2) 0.0500 3) 0.100 4) 0.300

Explanation / Answer

For zero order reactions half life is directly proportional to initial concentration.

And for one half life, 50% (0.200 M) of concentration consumed.

Hence remaining concentration is 0.200 M

So Option A is correct.

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