Question

22 6.022 x 10 Que molecules of a compound 'x' has 10 gm. What is the molarity of Solution containing 5gm of x in 2 litter?​

Answer 1

Answer:

22 6.022 x 10 Que molecules of a compound 'x' has 10 gm. What is the molarity of Solution containing 5gm of x in 2 litter?

Answer 2

Dear student,

Given :-

• molecules of x = 6.022 × 10²²
• mass of x = 10 gm
• volume for molarity, v = 2 L

To find :-

• molarity of solution containing 5 gm of x in 2 litres.

Solution :-

We know by the mole concept that;

       nₓ = wₓ/ mwₓ = Nₓ/ Nₐ

where, nₓ = moles of x

           wₓ = given weight of x

       mwₓ = molecular weight of x

         Nₓ = No. of molecules of x

          Nₐ = Avagadro Number

Putting the given values in the above formula, we obtain;

wₓ/ mwₓ = Nₓ/ Nₐ

 10/ mwₓ = 6.022 × 10²²/ 6.022 × 10²³

 10/ mwₓ = 1/ 10

      mwₓ = 100 gm

Now, for moles, we know that;

         

       n = wₓ / mwₓ  [wₓ for solution]

       n = 5/ 100

       n = 1/20 moles

For molarity, we know that;

      M = n/ volume (L)

Putting the given values in the above formula, we obtain;

      M = 1/20 / 2

      M = 1/20 × 1/2

      M = 1/40

Hence, the molarity of the solution containing 5 gm of x in 2 litres is 1/40.