How does the concept of conservation of mass apply to chemical reactions?a. The reactants and products have exactly the same atoms. b. The reactants and products have exactly the same molecules. c. The change in the amount of matter is equal to the change in energy. d. The change in the amount of matter is only a small percentage of the total mass.

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.

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