CHEM 1110 Group Quiz 11 - test 1 -  moles, grams and Avogadro's number.
(NA = 6.022 x 1023 mol-1)

Names:

1)   How many grams are there in 2.5 mol of water (H2O)?
 
 


                                                                               ____________________ g

2)   43.0 g of ammonia (NH3) is the same as how many moles of ammonia?
 



 

                                                                                 ____________________ mol

How many total atoms would there be for this number of moles of ammonia?  (Careful - there is more than one atom per molecule of ammonia.)


 

                                                                                 ____________________ atoms