Sodium azide, a compound containing only sodium (Na) and nitrogen(N), is used as

Question

Sodium azide, a compound containing only sodium (Na) and nitrogen(N), is used as a propellant for inflating airbags in someautomobiles. A sample of sodium azide was weighted into acrucible. The crucible was covered and heated until only Naremained. The crucible was then cooled and reweighed. The following data were collected.

Mass of crucible and cover, g 28.887
Mass of crucible, cover, and sodium azide, g 30.354
Mass of crucible, cover, and Na,g       29.406

(2) Write a chemical equation for the formation of Na andN2 from sodium azide.

Explanation / Answer

Formula of sodium azide = NaN3                                      2 NaN3 ---------> 2 Na + 3N2                                      2 NaN3 ---------> 2 Na + 3N2

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