6.02×1020 molecules of urea are present in 100 mL of its solution. The concentration of solution is

Given, number of molecules of urea = 6.02×1020∴Number of moles = 6.02×1020NA=6.02×10206.023×1023 =1×10-3 molVolume of the solution =100 mL=1001000 L=0.1 LConcentration of urea solution  (in molL-1 ) =1×10-30.1=mol L-1=1×10-2 mol L-1=0.01 mol L-1