Complex sentence: One of these, the explosive breakdown of sodium azide ((NaN 3) 2) into nitrogen gas (N 2) and sodium (Na), is what powers the life-saving airbags present in virtually all today's automobiles.
Split into simpler sentences: One of these is the explosive breakdown of sodium azide ((NaN 3) 2) into nitrogen gas (N 2) and sodium (Na). It is this process which powers the life-saving airbags present in virtually all of today's automobiles.