An aqueous solution of NH4Cl weighs 5 kg. The solution has 2 moles of NH4Cl present in it. The Density of the solution is 1.25 g/ml. (Atomic masses of N=14 ,H=1, Cl=35.5) Find the

a) Molarity of the solution

b) Molality of the solution.

c) Number of molecules of NH4Cl in the solution.

d) Number of H atoms in the solution.

e) If the solution is diluted to double its volume, what will be the Molarity of the solution?

you need to have a picture of the atom that way we can answer it

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.

the answers are

c and c