Automotive air bags inflate when sodium azide, NaN3, decomposes explosively to its constituent elements. How many moles of nitrogen gas are produced by the decomposition of 3.55 mol of sodium azide?

2.29 g of N2

Explanation:

We have to start with the chemical reaction:

The next step is to balance the reaction:

We can continue with the mol calculation using the molar mass of

(65 g/mol), so:

Now, with the molar ratio between  and  we can calculate the moles of  (2:3), so:

With the molar mass of we can calculate the grams:

I hope it helps!

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

c) should be the answer.