Dissolving `120g` of urea `(Mw = 60)` in `1000 g` of water gave a solution of density `1.15 g mL^(-1)`. The molarity of solution is:

Options

A. 1.78 M
B. 2.00 M
C. 2.05 M
D. 2.22 M

Answer

C

Explanation

Volume of solution `= ("Mass")/("Density")=(1120)/(1.15)=973.8mL`
Molarity, `M=(w_(B)xx1000)/(m_(B)xxV)`
`=(120xx1000)/(60 xx973.9)=2.05`]