Molarity and molality of a solution of caustic soda are respectively `11.12 M` and `94.12 m`. The density of the solution is

Options

A. ` 0.556 g mL^(-1) `
B. ` 5.56 g mL^(-1) `
C. ` 55.6 gmL^(-1) `
D. none of these

Answer

A

Explanation

` d = M((1)/(m)+("molar mass of solute")/(1000))`
`d = 11.12 ((1)/(94.12)+(40)/(1000))`
`=0.556 g mL^(-1) `