The mol 

What is it?

a word to indicate a number (6.02 x10²³)

Why is it necessary?

chemicals don’t react by mass(grams)… they react with particles

(H₂0 is not 2 grams of  H to 1 gram of O!)

… the mol will relate to the particles in  equations. 

How can we convert to it?

… by using CONVERSION FACTORS.

1.   mol mass                                                practice sheets d9,d10

…. the number of g/mol     

see your P.T. and add up the individual atomic masses for 1 mol

eg.  water  = 1 +1 + 16  = 18 g/mol     ?

     carbon dioxide =  12 + 16 + 16 = 44 g/mol

2A.   gram à mol                                              practice sheets d13

2B.   molà gram                                                       d15, d17,d18

                                                                           Heath p.109 Q.6-14

3A.   mol à particles (atoms or molecules)  Heath p. 104  Q.4-9

3B.    particles à mol                                    p. 109     Q.4,5,15

4A.     gramàmolàparticles

4B.     particlesà molà gram                           Heath p.109 Q. 16