1.

40% by weight solution will contain how much mass of the solute in 1 solution, density of the solution is 1.2 g/mL

Answer»

480 G
48 g
38 g
380 g

SOLUTION :Molarity`= ("% by weight of SOLUTE" xx "density of solution" xx 10"(in litre)")/(M)`
when M = mol. Weight of the solute
Molarity `=(40xx1.2xx10)/(Mxx1000)`.......(i)
Molarity `=("weight of the solute / M")/("VOLUME of solution (in litre)")`..........(ii)
From Eqs. (i) and (ii)
`("Weight of solute")/(M xx 1000)=(40xx1.2xx10)/(M xx 1000)`
Weight of solute = 480 g.


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