Rubbing alcohol is sold over the counter as a topic (skin) antiseptic. Rubbing alcohol is typically 70.0 % (v/v) iso-propyl alcohol, C3H7OH, in water. How much of this solution can you prepare with 500.0 mL of pure C3H7OH? Response area Response area Response area mL of solution

the answer is d. 74.02

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.