Answer: In addition to the process described in the text,

Chapter 20, Problem 20.72

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In addition to the process described in the text, a second process called the carbonnitrogen cycle occurs in the sun: 1 1H 1 12 6C 88n 13 7N 1 0 0g 13 7N 88n 13 6C 1 11 0 e 1 1H 1 13 6C 88n 14 7N 1 0 0g 1 1H 1 14 7N 88n 15 8O 1 0 0g 15 8O 88n 15 7N 1 11 0 e 1 1H 1 15 7N 88n 12 6C 1 4 2He 1 0 0g Overall reaction: 4 1 1H 88n 4 2He 1 2 11 0 e a. What is the catalyst in the above scheme? b. What nucleons are intermediates? c. How much energy is released per mole of hydrogen nuclei reacted in the overall reaction? (See Exercises 43 and 44 for the appropriate mass values.)

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