Question

The airbags in cars contain sodium azide, NaN3, and an excess of potassium nitrate, KNO3.In a car accident, the reactions shown occur, producing nitrogen. This causes the airbag to inflate rapidly.
2NaN3 → 2Na + 3N2
10Na + 2KNO3 → K2O + 5Na2O + N2
How many moles of nitrogen gas are produced in total when 1 mol of sodium azide, NaN3, decomposes in an airbag?

i want the method please.......

Answer 1

Answer : The total number of moles of nitrogen gas produced are 1.6 moles.

Explanation :

The given chemical reactions are:

(1) $2NaN_3\rightarrow 2Na+3N_2$

(2) $10Na+2KNO_3\rightarrow K_2O+5Na_2O+N_2$

First we have to calculate the moles of $Na\text{ and }N_2$ form reaction 1.

From the given balanced reaction 1, we conclude that:

As, 2 moles of $NaN_3$ decomposes to give 2 moles of Na

So, 1 moles of $NaN_3$ decomposes to give 1 moles of Na

and,

As, 2 moles of $NaN_3$ decomposes to give 3 moles of $N_2$

So, 1 moles of $NaN_3$ decomposes to give $\frac{3}{2}=1.5$ moles of $N_2$

First we have to calculate the moles of $N_2$ form reaction 2.

From the given balanced reaction 2, we conclude that:

As, 10 moles of $Na$ react to give 1 moles of $N_2$

So, 1 moles of $Na$ decomposes to give $\frac{1}{10}=0.1$ moles of $N_2$

Now we have to calculate the total number of moles of nitrogen gas produced.

Total number of moles of nitrogen gas produced = Moles of nitrogen gas produced from reaction 1 + Moles of nitrogen gas produced from reaction 2

Total number of moles of nitrogen gas produced = 1.5 mole + 0.1 mole

Total number of moles of nitrogen gas produced = 1.6 moles

Therefore, the total number of moles of nitrogen gas produced are 1.6 moles.

Answer 2

Answer:

Explanation:

1.6