Isopentyl acetate (c7h14o2), the compound responsible for the scent of bananas, can be produced commercially. interestingly, bees release about 1μg (1 × 10-6 g) of this compound when they sting. the resulting scent attracts other bees to join the attack. (a)calculate the number of molecules of isopentyl acetate released in a typical bee sting. (b)calculate the number of carbon atoms present.

1 μg of C₇H₁₄O₂ contains 4.62 × 10¹⁵ molecules and there are 3.23 × 10¹⁶ atoms of carbon present.

First, we want to calculate the number of molecules in 1 μg (1 × 10⁻⁶ g) of C₇H₁₄O₂. We will use the following relationships.

The molar ratio of C₇H₁₄O₂ to C is 1:7. The number of atoms of C in 4.62 × 10¹⁵ molecules of C₇H₁₄O₂ is:

1 μg of C₇H₁₄O₂ contains 4.62 × 10¹⁵ molecules and there are 3.23 × 10¹⁶ atoms of carbon present.

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The answer to your question is:

a) 4.64 x 10 ¹⁵ molecules

b) 9.28 x 10 ¹⁵ atoms of O2

Explanation:

MW C7H14O2 = 84 + 14 + 32 = 130 g

a)        130 g of C7H14O2 1 mol of C7H14O2

           1 x 10 ⁻⁶ g                    x

           x = 7.7 x 10 ⁻⁹ mol

          1 mol of C7H14O2     6 .023 x 10 ²³ molecules

          7.7 x 10⁻⁹ mol              x

          x = 4.64 x 10¹⁵ molecules

b)      130 g of C7H14O2     1 mol of C7H14O2

         1 x 10⁻⁶  C7H14O2       x

         x = 7.7 x 10 ⁻⁹ mol of C7H14O2

        1 mol of C7H14O2       2 mol of O2

        7.7 x 10 ⁻⁹                   x

         x = 1.54 x 10⁻⁸ mol of O2

       1 mol of O2  6.023 x 10 ²³ atoms

       1.54 x 10 ⁻⁸     x

        x = 9.28 x 10 ¹⁵ atoms of O2

on passing the small ampere of electric current through the tube made of ar and hg of cfl generates uv rays which excites the fluorescent and thus emits the high radiation by consumption of just 5- 12 w in comparison to incandescent light which requires more power such as around 40 - 55 w to lighten.

moreover the life span of fluorescent or cfl is around 8000 h whereas the life span of incandescent is around 1200 h

hence, the building installed with incandescent lights bears more electricity bill.