7. Suppose a student who took CHM 11500 last semester told you that the molar absorptivity of Fe(phen)3 2 is equal to 1.1 x 104 . Describe why you would still need to construct a calibration plot in order to determine the concentration of Fe2 in an unknown solution.

the answer would be a

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.

it's 3.2 on edge, i just took the test.