Enter your answer in the provided box. A piece of sodium metal reacts completely with water as follows: 2Na(s) + 2H2O(1) 2NaOH(aq) + H2(g) The hydrogen gas generated is collected over water at 19.0C. The volume of the gas is 171 mL measured at 0.969 atm. Calculate the number of grams of sodium used in the reaction. (The vapor pressure of water at 19.0C = 0.0217 atm.)