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

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.

there all right good

explanation:

the ideal gas law equation is as follows

pv = nrt

where p - pressure

v - volume

n - number of moles

r - universal gas constant

t - temperature

so if the pressure, volume and temperature are already known

we are left with n and r

since r is the universal gas constant that has a known fixed value then r too is known

so we are left with 'n'

once we know temperature volume and pressure

we can find the number of moles of gas present using the ideal gas law equation

this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.