A chemist produces 4.50 grams of a compound made of copper and chlorine. Further experiments show that the sample contains 2.12 grams of copper. Find the percent composition of copper and chlorine in the compound and then identify the compound as either copper(I) chloride (CuCl) or copper(II) chloride (CuCl2 )

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.

is it d? cause im still confusion