A chemical engineer is studying the rate of this reaction. 250, (g) 250, (g)+0₂ (g) He fills a reaction vessel with SO; and measures its concentration as the reaction proceeds. Here's a graph of his data: (W) [os] 08- t(s) Use this graph to answer the following questions: What is the half life of the reaction? 2 Round your answer to significant digits. Suppose the rate of the reaction is known to be first order in 2-0 SO, Calculate the value of the rate constant. k = ☐ X 5 Round your answer to 2 significant digits. Also be sure you include the correct unit symbol. Predict the concentration of SO3 in the engineer's reaction Vessel after 0.180 seconds have passed. Assume no ellie reaction is important, and continue to [80]-DM

part A 1. Concentration of Known NiCl2 Stock Solution ___500________ mM   Tube Number   Blank #1 #2 #3 #4 #5 2. Volume of Known NiCl2 Stock Solution Pipetted Into Tube 0.00 mL 1.50 mL 3.00 mL 4.50 mL 6.00 mL 7.50 mL 3. Volume of Distilled Water Pipetted Into Tube 11.00 mL 9.50 mL 8.00 mL 6.50 mL 5.00 mL 3.50 mL 4. Total Volume of Solution In Tube 11.00 mL 11.00 mL 11.00 mL 11.00 mL 11.00 mL 11.00 mL 5. Diluted Concentration of NiCl2 In Tube ----------- 68.2 mn 136mn 204mn 273mn 341mn 1. Equation for the Best-Fit Straight Line Y=3822x+4.7446 2. Absorbance at λmax for Diluted Unknown 0.87 3. Concentration of NiCl2 in Diluted Unknown 25.693 mM Determine the dilution factor for your diluted unknown U1 based on how you prepared the solutions in Part A. Record this on your report sheet in Part D #4.

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