Question

Concentration of the solution prepared by dissolving 40g of Nacl in 100ml water at room temperature is

Answer 1

1)Human Beings pollute the Air which is necessary for existence of life on earth.

2) Humans pollute subsoil minerals such as precious metals which a bid natural resource.

3)Humans extract the coal (natural resource) which can destroy forests and other landscapes.

4)Another major natural resource is water . People wash clothes and throw waste in water bodies which pollute them.

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Answer 2

Answer: Mass of sodium chloride (Solute) = 40gm

Mass of water (solvent) = 100 gm

Mass of solution = 40+100 = 140gm

Concentration = (Mass of Solute / Mass of Solution) * 100  

Concentration = (40/100)*100 = 40%  

Concentration of solution is 40%.

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