Most modern cars are fitted with airbags. These work by decomposing sodium azide to liberate nitrogen gas, which inflates the bag.
2NaN3 3N2 + 2Na
A typical driver’s airbag contains 50 g of sodium azide.
Calculate the volume of nitrogen this will produce at room temperature.
A 9.2 dm3
B 13.9 dm3
C 27.7 dm3
D 72.0 dm3
2.What is the number of molecules in 500 cm3
of oxygen under room conditions?
A 1.25 x 1022
B 1.34 x 1022
C 3.0 x 1022
D 3.0 x 1026
( 22 = Power of 10)
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Can you explain the answers to these questions please? watch
- Thread Starter
- 26-03-2011 18:26
- 26-03-2011 18:30
For the first one, calculate the number of moles of sodium azide using its molecular weight. From the equation, you can see that you produce one and a half moles of nitrogen gas for each mole of NaN3. Then simply remember that one mole of an ideal gas takes up 22.4 litres and bob's your uncle!