Question

Calculete number
of moles and molecules of urea having mass of 15g.​

Answer 1

Answer:

Molar mass of urea = 60g

No of moles = given mass/molar mass

                  = 15/60

                   =0.25 moles

 No of molecules = Avogadro no * moles

                            = 6.022 * 10^23 * 0.25

                           = 1.5055 *10^23 molecules are present