Question

How many molecules of glucose are contained in one liter of a 2M solution

Answer 1

Number of moles = Molarity * Volume = 2M * 1Liter = 2 moles

Number of molecules = Number of moles * 6.02 * 10^23 molecules
                                   = 1.204 * 10^24 molecules

Answer 2

Hope this helps, have a nice day ahead!