One series of reactions that inflates airbags in automobiles is the decomposition of sodium azide (NaN3). Determine the mass of N2 produced if 129.2 grams of NaN3 is decomposed. Keep 4 significant digits in your answer. 2 NaN3 --> 2 Na + 3 N2

**if you can do more of these questions id be greatly appreciated

You encounter a solution that is acidic and you decide to test it by adding a small amount of a strong acid. the ph lowers slightly but is approximately unchanged, and still remains acidic. what can you say about the solution? a. it is a buffer solution. b. it is not a buffer solution it is a strong acid solution. d. the solution has been neutralized. e. the solution has excess acid present