EXAM PROBLEM #2 Instructions: Type your answers to the questions in the textbox below. Label your answers A and B. Show all work on your “work” page.  Label which problem it is (#2). Reaction:     4 NH3 (g)  +  5 O2 (g) –>  4 NO (g)  +  6 H2O (g)              ΔH = -906.0 kJ Questions: A.   Is heat released or absorbed by the system in this reaction? Briefly explain how you know. B.   How many grams of ammonia, NH3 must react in order for 53.18 kcal to be released or absorbed in this reaction?    

When computing the correlation​ coefficient, what is the effect of changing the order of the variables on​ r? 

There are 50,000 households in Village V. Of all households in Village, 30% of the households use more than one language. Suppose that we do know this fact and want to estimate the true proportion of households which use more than one language. We take a random sample of 200 households from  all households in Village ensuring the independence of the sample.  Find the standard error of the sampling distribution, and then find the probability that less than 62 households in this sample use more than one language using an appropriate formula and the Normal distribution table shown below. Show your work.

EXAM PROBLEM #5 Instructions: Type your answer to the question in the textbox below. Show all work on your “work” page.   Label which problem it is (#5) Situation: A large bottle contains some boric acid solution with an unknown concentration.  A 25.00 mL sample of this acid solution is titrated with a 1.438 M NaOH solution.  It takes 18.31 mL of the NaOH solution to reach the endpoint of the titration. Reaction:  H3BO3 (aq)  +  3 NaOH (aq)   –>   3 H2O (l)  +  Na3BO3 (aq) Question: What is the molarity of the unknown boric acid solution?  

  33.  In  addition to Ceftriaxone, this patient should be treated with————————–           

A: Name the muscle label A.    

Name of the spinal nerve labeled A.   

Name the structure labeled A.      

Name the structure labeled A      

Write in the comment box the name of the endocrine gland and name the structure labeled A.