There are approximately 160 grams in 1 mol of fe203 molecules therefore there would be 79/160 = 0.49375 mols of fe203 molecules in 79 grams therefore 5 atoms in total for each molecule of fe203 therefore 79/160 *5 =79/32=2.46875 mols in atoms
The cloud with those characteristics is #1
What of the gasses is N and the flame changes it's color from Orange to blue
To separate off different products in order of their boiling points. You do it by a process of heating and cooling in a horizontal condenser usually.
