Question

2 On collision, airbags in cars inflate rapidly due to the production of nitrogen.
The nitrogen is formed according to the following equations.
2NaN3
→ 2Na + 3N2
10Na + 2KNO3
→ K2
O + 5Na2
O + N2
How many moles of nitrogen gas are produced from 1 mol of sodium azide, NaN3
?
A 1.5 B 1.6 C 3.2 D 4.0

Answer 1

why doesn’t concentrated H2SO4 act as on oxidizing agent with NaCl?

Answer 2

15 Concentrated sulphuric acid is added to separate solid samples of sodium chloride, sodium
bromide or sodium iodide.
With which sample(s) does sulphuric acid act as an oxidising agent?
A sodium chloride only
B sodium chloride and sodium bromide
C sodium bromide and sodium iodide
D sodium iodide only

Answer 3

1 mole of sodium azide will produce 1.5 moles of Nitrogen
so the correct answer is A 1.5

Answer 4

no the answer is b not A

Answer 5

How come 1.6 ?

Answer 6

Got you an answer. The question is how many moles of N2 can we get from NaN3..don't just consider the first reaction, also consider the second.

\[2NaN3→ 2Na + 3N2 \]
\[10Na + 2KNO3 → K2O + 5Na2O + N2\]

1 mole of NaN3 gives 1.5 moles of N2 and 1 mole of Na.. okay keep the 1.5N2 aside..

next reaction is 10 moles of Na form 1 mole of N2.. so 1 mole of Na (the mole from the first reaction) would form 1/10 moles of N2.. 0.1 N2.. now you add up the moles.. 1.5+0.1=1.6 :))