What is a balanced equation for the reaction of hydrazine liquid with oxygen gas to produce nitrogen gas and steam?

N2H4 (l) + O2 (g) = N2 (g) + 2 H2O (g)

Just wanted to add that the novel "The Martian" (and motion picture of the same name) has the protagonist burn Hydrazine and Oxygen to produce water for his crop of potatoes. What the author neglects to mention is that hydrazine is extremely toxic...AND, also claims that there would be a large build-up of hydrogen. Nope, only water and nitrogen are the products of this reaction, and he would probably suffer from some serious health complaints. A neat story, but with plenty of mistakes (and plot problems)!! ; )