Question

Automotive air bags inflate when sodium azide decomposes explosively to its constituent elements:

2NaN3 (s) → 2Na (s) + 3N2 (g)

How many moles of N2 are produced by the decomposition of 1.25 mol of sodium azide?

a) 4.32
b) 8.64
c) 1..e2
d) 1.44
e) 0.960

Answer 1

Answer:

1.875 moles of N₂ produced from 1.25 moles of sodium azide.

Explanation:

Given data:

moles of sodium azide = 1.25 mol

moles of N₂ produced = ?

Balance chemical equation:

2NaN₃(s) → 2Na(s) + 3N₂(g)

Now we compare the moles of sodium azide and N₂ from balance chemical equation,

                          NaN₃   :    N₂

                              2      :      3

                            1.25   :      3/2×1.25  = 1.875

1.875 moles of N₂ produced from 1.25 moles of sodium azide.