Mole Conversions

(Yup, there IS such a thing!!)

1) From particles <----> moles

• From particles ---> moles  

 Ex, 3.01 x 10^24  particles of C --->  mole

 3.01 x 10^24 particles   X       1 mole         =  5.00 moles

                                              6.022 x 10^23 particles

PS, Don't forget sig figs & units..

• From moles ---> particles/ molecules/ formula units

Ex, 0.75 moles  of CO2 ---> molecules

0.75 moles  X  6.022 x 10^23 molecules  = 4.5 x 10^23  molecules

                                   moles

Now, 0.75 moles of CO2 ---> atoms of O2

              4.5 x 10^23  molecules X  2 atoms of  O  = 9.0 x 10^23 atoms



2) From grams <----> moles
 

• From moles ---> grams

Ex, 2.04 moles of Carbon ---> grams

                 molar mass of Carbon = 12 g / mol
            
                 2.04 moles  x  12 grams  =  24.5 grams of Carbon
                                      1 mole

Ex, 0.341 moles of NO2 --->  grams 

       molar mass of NO2 = 46.0 g / mol

       0.341 moles  x  46.0 grams   =  15.6 grams of NO2  

                                         1 mole

• From grams ---> moles 

Ex,, 3.45 grams of Carbon ---> moles

        atomic mass of carbon = 12 grams

                  3.45 grams  x    1 mole   =  0.288 moles
                                       12 grams

Ex,, 6.2 grams of MgCl2 ---> moles

        molecular mass of MgCl2 = 95.3  grams

        6.2 grams  x    1 mole    =  0.065  moles

                                     95.3 grams

This is what we took so far.. Explain the rest next class!!! :D:D