Question

What are the number of molecules contained in a drop of water weighing 0.06gm

Answer 1

Answer:1.987x10^21molecules

Explanation: number of moles=number of molecules/avogadro's constant

To find the number of molecules multiply avogadro's constant by the number of moles of H2O.

number of moles =0.06g/molar mass of water

                              =0.06/18

                              =0.00333moles

number of molecules=avogadro's constant x number of moles

                                    =6.022x10^23 x0.00333

                                    =1.987x10^21 molecules