Lesson_2_-_Example_Solutions-09_

Lesson_2_-_Example_Solutions-09_ - Lesson 2 Example 2-1...

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Unformatted text preview: Lesson 2 Example 2-1 Isopentyl acetate (C 7 H 14 O 2 ), the compound responsible for the scent of bananas, can be produced commercially. Interestingly, bees release about 1 μ g of this compound when they sting, in order to attract other bees to join the attack. How many molecules of isopentyl acetate are released in a typical bee sting? How many atoms of carbon are present? Basis: 1 μ g C 7 H 14 O 2 Data: M C = 12 g/mol M H = 1 g/mol; M O = 16 g/mol N A = 6.022 x 10 23 mol-1 A 2 O 14 H 7 C 2 O 14 H 7 C 2 O 14 H 7 C N M m N × = g/mol 130 16 2 1 14 12 7 M 2 O 14 H 7 C = × + × + × = 1 Lesson 2 Therefore: 2 14 7 15 6 23 2 O 14 H 7 C O H C of molecules 10 6 . 4 μg 10 1 g 1 mol 10 022 . 6 g/mol 130 μg 1 N × = × × × × = C of molecules 10 22 . 3 10 6 . 4 7 N 7 N 16 15 2 O 14 H 7 C C × = × × = × = 2 Lesson 2 Example 2-2 Penicillin, the first of a now large number of antibiotics, was discovered accidentally by the Scotish bacteriologist Alexander Fleming in 1928, but he was never able to isolate it as a pure compound. This and bacteriologist Alexander Fleming in 1928, but he was never able to isolate it as a pure compound....
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This note was uploaded on 09/23/2010 for the course CHEM 103 taught by Professor Chem during the Fall '09 term at University of West Georgia.

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Lesson_2_-_Example_Solutions-09_ - Lesson 2 Example 2-1...

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