Given the following information about an enzymatic reaction, calculate the initial velocity. Your numerical answer (to two decimal places) is assumed to have the units of nM sec-1. Vmax = 5 nM sec-1 KM = 1 mM [S] = 10 mM

Consider the reaction: H2 (g) +I2 (g) → 2 HI (g) A chemist performed an experiment and monitored the concentration of I2 during the course of the reaction. The red line in the graph below represents the results obtained. Which line in the plot would best represent how the concentration of HI changes during the course of the reaction? Time (s) Select an answer and submit. For keyboard navigation, use the up/down arrow keys to select an answer. a a b b d d е е Concentration (M)

22. Based on the reaction rate data shown in Table 1, plot a properly labelled graph of Concentration vs. Time in the space provided. Draw a curve to connect the points. Table 1: Reaction rate Time (s) 0 1 2 3 4 5 6 7 8 9 10 Concentration (mol/L) 0 0.15 0.20 0.30 0.50 0.80 0.90 0.95 0.98 0.99 1.00 This curve should ascend over time. Conc vs 0.10 6.9 0.8 0.7 0.6 G.S 6.4 0.3 0.2 O. I • time 10 (mol/L) Concentration 4. Timeros 8 12 23. a) Based on the reaction rate data in Table 1, determine the average rate of chemical production between 2 s and 7 s. b) On the above graph, draw a line segment to represent the details in this question. Note: Show all calculations, follow the rules of significant figures, and box your final answer.

3) A chemical reaction was conducted at 4 different temperatures and the following data was obtained. Plot the In(k) versus the inverse of the respective temperature using linear regression analysis (Excel). Find the slope (from the graph) and what does that number represent? Use Arrhenius equation. Calculate the Activation Energy for the reaction. Rate constant (k) Temperature of reaction (°C) 0.0521 15 0.101 25 0.184 35 0.332 45 NOTE: Make sure to attach the graph paper with proper calculation.

Consider the reaction 5Br (aq) + BrO, (aq) + 6H+ (aq)→3B12 (aq) + 3H20(1) The average rate of consumption of Br is 1.36x104 M/s over the first two minutes. What is the average rate of formation of Br2 during the same time interval? Express your answer with the appropriate units. • View Available Hint(s) HẢ |] ? Rate of formation of Br2 Value Units %3D

Here is a graph of the pressure of ozone (03) in a reaction vessel during a certain chemical reaction. Use this graph to answer the questions in the table below. atm 3.00- 2.50- 200- 1.950 1.50- 1.00- 0.50- > 0 500 1000 1500 seconds 2000 2500 3000 3

Your laboratory is asked to analyze a water sample for a particular pesticide. You know from previous study that this pesticide degrades via a first order, irreversible reaction. The first order rate constant (k) for the reaction at 4 °C is 0.02 day¹. The activation energy for the reaction is known to be 10 kcal/mol. The standard preservation method for water samples containing this pesticide is to store the sample at 4 °C for no more than 24 hours prior to analysis. Calculate the fraction of the pesticide that remains in the sample after 24 hours of storage at 4 °C. b. A newly hired staff member collects a sample of the water but forgets to store it at 4 °C. Instead, they leave the sample in the trunk of their car (average temperature 35 °C) over the weekend. 60 hours later the sample is analyzed and found to contain 0.01 mg/L of the pesticide. What was the pesticide concentration in the water at the time the sample was taken?