Using similar triangles and proportions (do NOT use a formula), find x in the diagram.  To get full credit you must write the triangle similarity statement that relates the three triangles. Click ‘True’ when finished.

The following results were obtained for the below reaction in experiments designed for the study of the rate of the reaction.  (12 pts) A + B=> 2C Experiment Initial concentrations  mol/L    [A]                                          [B] Rate of disappearance of  A (M/sec) 1 0.030 0.030 2.0×10-3 2 0.030 0.060 4.0×10-3 4 0.060 0.030 4.0×10-3 Determine the order of the reaction with respect to A. (3pts) Determine the order of the reaction with respect to B. (3pts) Calculate the value of the rate constant, k for the reaction. Include units. (1pt) Write the differential rate law for this reaction. (1pt) What will be the initial rate of disappearance of A, if an experiment is attempted with A and B both equal to 0.060M?(1pt) Write the integrated rate law for the concentration of A (1pt ) Calculate the half-life for  A (1pt) Calculate the concentration of A in experiment 2 after 60 seconds (1 pt) To receive full credit, report your answers below and submit a picture of your work to the Exam 4 Solutions, Extra Credit and Partial Credit assignment AFTER SUBMITTING COMPLETED Midterm. Answers:

41) What happens to the core of a star after a planetary nebula occurs?

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42) Which of the following sequences correctly describes the evolving stages of life for a low-mass star?

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