Sodium reacts with oxygen to produce sodium oxide, 4Na(s) + O_2 (g) rightarrow 2Na_2O (s) How many grams of Na_2O are produced when 2.90 moles Na react? If you have 17.0 g Na, how many grams of O_2 are required for reaction? How many grams of O_2 are needed in a reaction that produces 77.0g Na_2O?