If 20.0 g NaOH reacts with 30.0 g of H2SO4 how much Na2SO4 is produced? Given: 2NaOH(aq) + H2SO4(aq) | Na2SO4(aq) + 2H2O(l)

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.