Question

Q. If active mass of a 6 percent solution of a compound is 2, it's molecular weight will be <br />a. 30. b. 15<br />c.60. d. 22

Answer 1

6% of solution contains 6g of compound in 100ml of solution.

Mass of compound present in 1 liter of solution = 60g

Concentration = Moles/liter

= 60/Molar mass

Given active mass = 2

So, 60/Molar mass = 2

=> Molar mass = 30

Ans: Option a. 30

Answer 2

heya......


A 6% solution contains 6 g of the compound in 100 ml of solution.

Mass of compound present in 1 litre of solution = 6o g 

Let M be the molar mass.

Concentration = 60 g/litre = (60/M) moles/litre

Active mass(given) = 2

Therefore, 60/M = 2

Molar mass M = 60/2 = 30.


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