Which of the following contains the most atoms: A. 1 mol of SF6
B. 1 mol of HCl
C. 1 mol of CH3CH2OH
D. 1 mol of B2F4
E. all contain the same number of atoms

4al + 3o2 → 2al2o3 what does the "3" in front of o2 stand for? a) it indicates that there are 5 oxygen atoms after you add the coefficient and the subscript. b) it indicates that that there are are total of 6 oxygen atoms all bonded together as a single molecule. c) it indicates that there are 3 oxygen molecules chemically bonded to each other in the reaction. d) it indicates that there are 3 separate oxygen molecules in the reaction.