Consider the reaction: 3a + b + 2 c æ d + e where rate = k[a]2 [c]2 . a reaction was performed where [b]o = [c]o = 0.500 m and [a]o = 3.20 x 10-5 m. a plot of 1/[a] vs time (min) gave a plot with a straight line relationship and after 3.00 min, [a] = 2.7 x 10-6 m. what was the initial rate of the reaction described above?

What is the correlation coefficient between the variables? round to three decimal places. enter your answer in the box

Use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2 + 9 = −26 −3 − 7 = 13

Two researchers are attempting to create a new psychotherapy protocol that more reduces panic attacks. they believe that they have succeeded and are now in the clinical trial period of their protocol's development. they are working with several cohort groups, some of which have been through the new protocol, while others have done the standard protocol currently recommended. if these researchers are interested in evaluating the difference in the percentage of test subjects who successfully decreased their panic attacks in 2 months on the new protocol versus the percentage of test subjects who successfully decreased their panic attacks in 2 months with the traditional protocol, which of the following statistical tests would be most appropriate? a. analysis of variance (anova) b. correlation c. chi-square test d. paired t-test e. independent t-test