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

Options

A. 480 g
B. 48 g
C. 38 g
D. 380 g

Answer

A

Explanation

Molarity =
`("% by weight of solute "xx" density ofsolution "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")/(Mxx1000)=(40xx1.2xx10)/(Mxx1000)`
Weight of solute = 480 g.