What is the empirical formula of an unknown compound if was determined by a laboratory experiment that it is made up of 27% by mass of carbon and 73% by mass of oxygen?

The empirical formula for the given compound is

Explanation:

We are given:

Percentage of C = 27 %

Percentage of O = 73 %

Let the mass of compound be 100 g. So, percentages given are taken as mass.

Mass of C = 27 g

Mass of O = 73 g

To formulate the empirical formula, we need to follow some steps:

Moles of Carbon =

Moles of Oxygen =

For the mole ratio, we divide each value of the moles by the smallest number of moles calculated which is 2.25 moles.

For Carbon =

For Oxygen =

The ratio of C : O = 1 : 2

Hence, the empirical formula for the given compound is

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.