Please Please Please Help Me With These Questions!!!!

1. Calculate the molar masses of the following chemicals. Be sure to show all work and indicate your final answer with a circle or box.
   

ACl2

BBeCl2

C(NH4)2SO4

DK2(NO3)

1. Given the number of moles of each find the number of grams of each.
   
   

C21.5 moles of Sodium Carbonate

D6 moles of hexane C6H6

1. Given the mass of each substance in grams find the number of moles of each:
   

A10 grams of HF

B1.2 grams of FeCl3

C12.7 grams of CO2