1.

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

Answer»

2 mol `dm^(-3)`
0.5 mol `dm^(-3)`
0.125 mol `dm^(-3)`
0.0005 mol `dm^(-3)`

Solution :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)`


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