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EXAM QUESTION #11 Instructions: Type your answers to the questions in the textbox below. Label your answers A, B, C. Show all work on your “work” page.  Label which problem it is (#11) Reaction:     4 NH3 (g)  +  5 O2 (g) –>  4 NO (g)  +  6 H2O (g)               Questions: A.   Determine the enthalpy change for this reaction using some of the data shown below these questions.  Choose only one option. B.   Is heat released or absorbed by the system in this reaction? Briefly explain how you know. C.   How many grams of ammonia, NH3 must react in order for 72.93 kcal to be released or absorbed in this reaction?         The molar mass of NH3 is 17.04 g/mol. Data: Option 1:  Standard Enthalpies of Formation (kJ/mol) H2O(g) -241.82   NH3 (g) -45.9 H2O(l) -285.83   NH3 (aq) -80.29 N(g) +472.7   O2 (g) 0.0 N2 (g) 0.0   O3 (g) +142.7 NO(g) +90.25   NO2 (g) +33.2   Option 2: Step Reaction Enthalpy Change a N2 (g)  +  O2 (g)  –>  2 NO(g) +180.5 kJ b N2 (g)  +  3 H2 (g)  –>  2 NH3 (g) -91.8 kJ c 2 H2 (g)  +  O2 (g)  –>  2 H2O(g) -483.6 kJ  

In transcription, what is the starting material, the ending material, and the major enzyme that catalyzes the process?

What amino acid is used to initiate most proteins in eukaryotes?

EXAM PROBLEM #2  Instructions: Below is a numbered list of terms that describe the examples provided in the questions. Select the one term that BEST describes the example item. No phrases will be used more than once. Not all phrases will be used. Choose which one of these terms is the best description for each example item provided in the questions: (1)    alkaline earth metal (2)    metalloid (3)    transition metal (4)    post transition metal (5)    homogeneous mixture (6)    heterogeneous mixture (7)    molecular compound (8)    ionic compound (9)    nonpolar covalent bond (10)  polar covalent bond (11)  type of chemical reaction that causes the beaker to get colder (12)  type of chemical reaction that causes the beaker to get warmer   Questions – each of these is an example of one of the terms listed above.  Choose the best term for each one: A.   AgCl:  [definition1] B.   C-N:  [definition2] C.   Endothermic Reaction:  [definition3] D.   HCl(aq):  [definition4] E.   Iron:  [definition5]

For this exam, the following information is provided, click ON THE LINK to Preview the document during the exam: Some Mathematical Equations Periodic Table Electronegativity Values Ions to Know Solubility Rules Conversions and Constants to Memorize Note: If conversions are used that are not in this document, no credit will be given for that question. Formatting instructions for answers typed into quiz textboxes:  If subscripts or superscripts are needed, use the subscript, T2 or superscript, T2 buttons. If the wrong one is displayed in the menu bar, click the down arrow next to it to choose the other one. Click on the button to turn it on, then click on it again to turn it off. For numbers in scientific notation , you can use E or the superscript button, T2.  So, either 1.5E9 or 1.5×109. If you need to make a textbox larger , grab and drag the dotted triangle just outside the bottom right corner.

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Your patient is a G2P1 and had a cesarean section for her first baby who was breech. This baby is cephalic and the patient is in labor at 8/90/+1, comfortable with her epidural in place.  She calls you in complaining of a “tearing sensation” in her abdomen, what are you concerned about?

Which of the following is an abductor of the hip joint.

This muscle originates at the ischial tuberosity and inserts on the anterior medial surface of the tibia just below the condyle.  It is an extender of the hip and flexor of the knee.

The elbow joint is a biaxial joint.