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Q.

If a solution contains 60g of common salt in 240g of water, the (W/W) percentage is: 

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a

25%

b

10% 

c

20%

d

15%

answer is C.

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Detailed Solution

The amount of solvent that is water is 240 grams. 

Thus, the mass of the solution is 240+60=300 grams. 

Thus the concentration of the solution by mass percentage is given as- 

Concentration= mass of solute/mass of solution×100. 

Concentration=60/300×100 

Concentration=20% 

The concentration of the solution is 20%.

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