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

Which characteristics can be used to differentiate star systems? check all that apply.

If we compare and contrast electromagnetic waves with sound waves, all but one statement is true. that is a) sound waves require a medium to travel while electromagnetic waves do not. b) electromagnetic waves can travel through the vacuum of space while sound waves cannot. c) electromagnetic waves must have a medium in which to travel, but sound waves can travel anywhere. eliminate d) sound waves must bounce off of matter in order to travel while electromagnetic waves do not require matter to be present.

Which of the following describes a compound? (hint: carbon and oxygen bo a. a piece of pure carbon, containing only carbon atoms b. oxygen gas surrounding a solid piece of carbon c. a substance made of two oxygen atoms for each carbon atom carbon and oxygen atoms mixed without being bonded together