# Problem: The decomposition of urea (NH 2CONH2), an end product in protein metabolism, occurs according to the following reaction:  NH2CONH2 (aq) + H+ (aq) + 2H 2O (l) → 2NH 4 + (aq) + HCO3– (aq) The rate of decomposition only depends on the concentration of urea, and the rate constant for the decomposition is 4.28 x 10-4 s-1 at 25 oC. a. What is the order of the decomposition reaction? How can you tell?   b. What is the concentration of urea in this solution after 2 minutes if the starting concentration is 0.500 M?

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The decomposition of urea (NH 2CONH2), an end product in protein metabolism, occurs according to the following reaction:

NH2CONH2 (aq) + H+ (aq) + 2H 2O (l) → 2NH 4 + (aq) + HCO3 (aq)

The rate of decomposition only depends on the concentration of urea, and the rate constant for the decomposition is 4.28 x 10-4 s-1 at 25 oC.

a. What is the order of the decomposition reaction? How can you tell?

b. What is the concentration of urea in this solution after 2 minutes if the starting concentration is 0.500 M?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Identifying Reaction Order concept. If you need more Identifying Reaction Order practice, you can also practice Identifying Reaction Order practice problems.

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Based on our data, we think this problem is relevant for Professor Mozaffari's class at HCC.