1. Airbag Design
Assume that 65.1 L of N2 gas are needed to inflate an air bag to the
proper size. How many grams of NaN3 must be included in the gas
generant to generate this amount of N2?
(Hint: The density of N2 gas at this temperature is about 0.916 g/L).
NaN3(s) ---> Na(s) + N2(g)
Na(s) + Fe2O3(s) ---> Na2O(s) + Fe(s)
2. Water from a Camel
Camels store the fat tristearin (C57H110O6) in the hump. As well as
being a source of energy, the fat is a source of water, because when
it is used the reaction take place,
2 C57H110O6(s) + 163 O2(g) ---> 114 CO2(g) + 110 H2O(l)
What mass of water can be made from 1.0 kg of fat?
3. Water in Space
In the space shuttle, the CO2 that the crew exhales is removed from the
air by a reaction within canisters of lithium hydroxide. On average, each
astronaut exhales about 20.0 mol of CO2 daily. What volume of water will
be produced when this amount of CO2 reacts with an excess of LiOH?
(Hint: The density of water is about 1.00 g/mL.)
CO2(g) + LiOH(s) ----> Li2CO3(aq) + H2O(l)
4. Rocket Fuel
The compound diborane (B2H6) was at one time
considered for use as a rocket fuel. How many grams
of liquid oxygen would a rocket have to carry to burn
10 kg of diborane completely?
(The products are B2O3 and H2O).
B2H6 + O2 -----> B2O3 + H2O
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