Diantara senyawa di bawah ini yang tidak berisomer dengan n- heksana adalah a) 2 metil pentana
b) 2 etil pentana
c) 2,2 dimetil butana
d) 2,3 dimetil butana
e) 3 metil pentana
​

the formula mass of a molecule or a compound is the sum of the atomic weights of the atoms in its empirical formula

(that's what i know about formula mass)

the answer is 0.42 is that is an option. this question provides no info

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.

answerambulatory;