Dr. Grubbs is dоing а stоichiоmetry bаlloon demo. This involves the combustion of hydrogen to give wаter. a. (5 points) Write the balanced molecular reaction. b. (15 points) Considering ideal gas behavior and that only the contents of the balloon react, calculate the mass of water produced from Dr. Grubbs filling a 4.00 L balloon with 1.25 atm of hydrogen and 0.500 atm of oxygen in his lab kept at 23°C.