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    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)

    Thanks =D

    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!
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