A sample of 11.0 g of sodium is reacted with 18.6 g of water to produce sodium hydroxide and hydrogen gas. Using the balanced equation below, predict which is the limiting reactant and the maximum amount in moles of hydrogen gas that can be produced. 2Na+ 2H2O + 2NaOH + H2

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.