The molarity of urea (molar mass 60 g `mol^(-1)`) solution by dissolving 15 g urea in 500 `cm^(3)` of water is

Options

A. 2 mol `dm^(-3)`
B. 0.5 mol `dm^(-3)`
C. 0.125 mol `dm^(-3)`
D. 0.0005 mol `dm^(-3)`

Answer

B

Explanation

Urea molar mass = 60 g/mol
Molarity `=W(M xx V(dm^(3)))`
`=15/(60 xx 05) = 15/(6 xx 5) = 1/2`
`=0.5 mol dm^(-3)`