Review the two plausible Lewis structures of HCN. Which structure is the best representation of HCN. Provide a brief 2-3 sentence justification that explains how you arrived at your answer. (Final answer to this question must be included in the space below to receive credit)

Equations:     Avogadro’s constant: 6.022 X 1023 Ideal Gas Constant R = 0.08206 L·atm/mol·K Ideal Gas Constant R = 62.3 L·torr/mol·K  1 atm = 760 torr = 760 mm Hg = 1.01325 X 105 kPa = 101.325 kPa = 1.01325 bar          

a. Step 1 in constructing a Lewis structure is to calculate the number of valance electrons available. How many valance electrons are available in the following molecular formula, HCP? (Final answers to this question must be included in the space below to receive credit) b. Step 2 in constructing a Lewis structure is to identify the central atom and draw single bonds between the central atom and all non-central atoms. Show the process and resulting intermediate Lewis structure for this step below for HCP. (This intermediate structure should be shown on your scratch paper sent to Dr. Metz) c. How many valence electrons are represented after Step 2 (part b)? How many valance electrons remain to complete the Lewis structure? (Final answers to this question must be included in the space below to receive credit) d. Step 3 in constructing a Lewis structure is to place nonbonding electron pairs around all non-central atoms to complete their octet. Show the process and resulting intermediate Lewis structure for this step below for HCP. (This intermediate structure should be shown on your scratch paper sent to Dr. Metz) e. How many valence electrons are represented after Step 3 (part c)? How many valance electrons remain to complete the Lewis structure (Final answers to this question must be included in the space below to receive credit) f. What is the electron domain geometry for HCP? (Final answers to this question must be included in the space below to receive credit) g. What is the molecular geometry for HCP? (Final answers to this question must be included in the space below to receive credit)

A sample of oxygen gas is confined in 1250 mL vessel and has an internal pressure of 1.45 atm. If the volume of the vessel is decreased to 984 mL, what is the final pressure of oxygen? (Final answers to this question must be included in the space below to receive credit) Work for this question needs to be provided in the work sent to Dr. Metz after the exam is complete  

  BONUS #9:    Which of the following is the best explanation of how a stimulus’s strength is transmitted to the central nervous system from sensory nerves?  

  Cognition (“the mental action or process of acquiring knowledge and understanding through thought, experience, and the senses”) is generally thought to be governed by….  

  Last and not least, this is a question involving a condition that affects most of us… whether in the car or on a boat, airplane, or roller coaster.  You may have to look this one up in the book but the answer is fairly intuitive.  Motion sickness seems to ________.  

  BONUS #6:    Receptors that respond to changes in room temperature are found in the skin.  Which of the following pairs of classifications below best fit the receptor type that is being described above?  

  What is the main function of the rods in the eye?  

  BONUS #8:    Tactile sensation is a combination of touch, pressure, stretch, and vibration.  Which of the following is most likely the receptor type that senses tactile stimulation?