42. How many valence electrons are contained in CO\'? b. 14 c. 8 d. 10 e. 9 A 15

Question

42. How many valence electrons are contained in CO'? b. 14 c. 8 d. 10 e. 9 A 15 g piece of iron (CP-25.09 J/(mol·°C)) is heated to a temperture of 95°C and placed into a bucket containing 4.5 gal of water (CP-75.38 J/(mol·°C)) initially at 25°C. Eventually, a. the temperature will be the average of 95°C and 25°C 43. b. the iron will be colder than the water c. the iron and the water will be at the same temperature. d. the water will be warmer than the iron. the iron will be warmer than the water

Explanation / Answer

42. E ( CO+ valence electrons = 4+6 - 1 = 9)

43. heat lost by iron = heat gained by water

   (15/55.845)*25.09*(95-x) = (17034.35/18)*75.38*(x-25)

x = final temperature = 25.006 c

answer: c

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