a. C6H12O6 = C6(H2O)6
b. (refer to hard copy)
c. No. Fructose is sweeter than glucose even though they have the same molecular formula, but due to different structural formulas, they have different properties and different sweetness.

There are many chemical pollutants in the air which may be carried by wind across the globe, and be dissolved in the rain or bodies of water used to irrigate ‘organic’ crops. Everything has chemical compounds in it.