A balloon is filled with gas at 29.8 degrees Celsius until its volume is 2,780 mL. The balloon is then placed into an industrial freezer for twenty-four hours before being remeasured. If the final temperature of the gas in the balloon is -38.4 degrees Celsius, what is the final volume of the balloon? Round your answer to the nearest 1 mL.

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)

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.