The enzyme urease is widely used for determining urea concentration in blood. The Michaelis constant for urease at room temperature is 2.0 mM and k2 = 2.8 × 104 s-1 at pH = 7.5. Based on the kinetic experiment, when 0.34 mM urease was used, the initial rate of the reaction was determined to be 3.49 M/sec. What is the concentration of urea in blood in unit of mM? Please keep your answer to two decimal place. Please convert all concentration unit to mM in calculation.

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