1) what is the molar mass of Al2(SO4)3 show all the steps, calculations and units?
2) show all the steps, calculations, and units. how many atoms are represented by the followings
a) 3,5 mol of nitrogen N
b) 4,56 mol of iron, Fe
3) How many molecules are represented by the followings( show all the calculating steps)
a) 22,5 mol of Br2
b) 15,55 mol of ammonia, NH3