Air bags are activated when a severe impact causes a steel ball to compress a spring and electrically ignite a detonator cap. this causes sodium azide (nan3) to decompose explosively according to the following reaction: 2nan3 1s2 h 2na 1s2 1 3n2 1g2 what mass of nan3(s) must be reacted to inflate an air bag to 70.0 l at stp?

Answer : The mass of reacted will be, 135.395 grams.

Explanation :

The balanced decomposition reaction will be,

First we have to calculate the moles of gas.

As we know that, at STP

22.4 L volume of gas present in 1 mole of gas

So, 70.0 L volume of gas present in mole of gas

Now we have to calculate the moles of .

From the balanced reaction, we conclude that

As, 3 mole of produced from 2 moles of

So, 3.125 mole of produced from moles of

Now we have to calculate the mass of .

Molar mass of = 23 + 3(14) = 65 g/mole

Therefore, the mass of reacted will be, 135.395 grams.