If a solution is 65 Liters and has 13 moles of NaCl dissolved in it what is the molarity of NaCl in this solution? *

Molarity = 0.2 M

Explanation:

Given data:

Number of moles of NaCl = 13 mol

Volume of solution = 65 L

Molarity of solution = ?

Solution:

Molarity is used to describe the concentration of solution. It tells how many moles are dissolve in per litter of solution.

Formula:

Molarity = number of moles of solute / L of solution

now we will put the values in formula.

Molarity = 13 mol / 65 L

Molarity = 0.2 mol/L

   mol/L = M

Molarity = 0.2 M

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.