The process of blood traveling from the heart, throughout the body and back to the heart is called:

Osteology is the study of:

Which in-class activity was the least helpful for learning course concepts in the second half of the semester?

Swedish people share a common language, culture, and ancestry; therefore, Sweden‚ the country in which they live, is an example of what?

The Nuer of South Sudan herd cattle for subsistence. They are

In Karen Brodkin Sacks’ study of the racial categorization of Jewish Americans in the twentieth century, she argues that while Jews were not considered white at the start of the century, they were considered white by the end of the century in American society. Her study demonstrates what  about race and whiteness?

18. (4 points) Draw all lone pairs on the structure below. Then, draw one resonance structure including all lone pairs.  (WCSU24.[x])    Enter the total number of lone pairs below:

14. (WCSU24.[x], 14 points) Aqueous solutions of ammonia are commonly used for cleaning.  a.  Draw a hydrogen bond between water (H2O) and ammonia (NH3).  Clearly label the hydrogen bond donor and acceptor on your drawing.   b. Besides the hydrogen bond, what other IMFs are present between water and ammonia?   c.  Would you predict that water and ammonia are miscible or immiscible? What about water and hexane (C6H14)?  Explain one of your answers   Give the number of hydrogen bond donors in ammonia in the box below.

25.  (WCSU24.[x]) Hot air is less dense than cold air and this is the reason that hot air balloons float! A hot air balloon on a cool summer morning is filled with air to a volume of 2.80 x 106 L and warmed to 195 °F (90 °C).  A hot air balloon must be inflated to a volume of approximately 3.10 x 106  L in order to float in air. a. (4 points) At constant pressure, provide a molecular-level explanation of the relationship between temperature and volume of a gas.   b.  (6 points) Calculate the temperature the gas must be (in °C) in order to float.   Enter the temperature of the gas below.

21.  (WCSU24.[x]) The ocean is said to contain one hundred trillion million dollars of gold (Au) in the form of gold(III) chloride.  For decades, chemists (and wannabes) have attempted to precipitate gold from seawater, albeit unsuccessfully.  One method would be to form an insoluble gold salt. Then, by a redox reaction, reduce the gold ions to pure gold ($$$!). a.  (6 points) In theory, sodium hydroxide could be used to precipitate gold from seawater.  Write the net ionic equation for the reaction below. Start with the complete ionic equation and identify spectators. AuCl3(aq)    +   3 NaOH (aq) ⟶  Au(OH)3 (s)     +    3 NaCl (aq)   b.  (4 points) Provide an alternative anion to hydroxide that could be used to precipitate gold in a similar reaction.  Write the formula of the insoluble product.  Explain in a few words how you selected the ion.   c. (12 points) You want to test the reaction in the lab before you head out to the ocean.  Calculate the mass (in g) of solid gold hydroxide (MW = 247.99 g/mol) that would form if 30 mL of a 0.200 M AuCl3 solution was mixed with 0.75 g of solid NaOH (MW = 40.0 g/mol). SHOW ALL WORK.   d.  (5 points) Calculate the percent yield if 0.98 g of precipitate are formed. (If you are unable to reach an answer in part c, you may use 3.0 g as the theoretical yield.)   Enter the percent yield in the box below.