With the advent of photosynthesis, the amount of oxygen in the atmosphere has varied over the eons up to 35 % by volume, theoretically leading to larger plants and animals. The current concentration is 21 % oxygen, 78 % nitrogen, and 1 % other gases such as argon and carbon dioxide Assuming an atmosphere of 32 % oxygen, to the nearest whole number (no decimal) what would be the ideal volume of water (in mL) initially placed in a 50 mL graduated cylinder (assuming the graduation goes up to the lip of the container) for optimal combustion (biggest explosion) if we collected pure hydrogen by displacement as in this experiment? Make sure to account for the stoichiometry of the combustion, that all gases involved are diatomic, and that equal moles of different ideal gases occupy equal volumes at the same temperature.