What volume will be occupied by 11.7 g of Helium in a balloon at an altitude of 10.0 km if the air pressure is 0.262 atm and the temperature is -50.0 °C?

204 L

Explanation:

According to ideal gas equation:

P = pressure of gas = 0.262 atm

V = Volume of gas = ?

n = number of moles =

R = gas constant =

T =temperature =

Thus volume occupied by 11.7 g of Helium in a balloon is 204L

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.