Question

The first reaction in the deployment of an automobile airbag is the decomposition of the solid binary ionic compound, sodium azide, into two products: nitrogen gas and sodium metal. What mass of sodium metal will form from the complete decomposition of 130 grams of sodium azide? Steps: (a) Write a balanced equation
(b) Use a conversion pathway calculation, starting with mass (g) of sodium azide ... #moles sodium azide#moles sodium metal productmass (g) sodium metal product.

Answer 1

Question #83262, Chemistry / General chemistry

The first reaction in the deployment of an automobile airbag is the decomposition of the solid binary ionic compound, sodium azide, into two products: nitrogen gas and sodium metal. What mass of sodium metal will form from the complete decomposition of 130 grams of sodium azide? Steps: (a) Write a balanced equation

(b) Use a conversion pathway calculation, starting with mass (g) of sodium azide ...♦ #moles sodium azide♦#moles sodium metal product♦ mass (g) sodium metal product.

Solution

$$2 \mathrm{NaN_3} = 2 \mathrm{Na} + 3 \mathrm{N_2}$$ $$M(\mathrm{NaN_3}) = 23 + 14 \cdot 3 = 65\ (\mathrm{g/mol})$$ $$n(\mathrm{NaN_3}) = \mathrm{m/M} = 130 / 65 = 2\ (\mathrm{mol})$$ $$n\ (\mathrm{Na}) = n(\mathrm{NaN_3}) = 2\ \mathrm{mol}$$ $$m\ (\mathrm{Na}) = n \cdot M = 23 \cdot 2 = 46\ (\mathrm{g})$$

Answer

$$m\ (\mathrm{Na}) = 46\ \mathrm{g}$$

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