The deployment of airbags during a car accident results from a chemical reaction that, until the 1990s, involved sodium azide, NaN ₃ . Sodium azide has since been replaced by less toxic substances that react in a similar way. In older airbags, a crash triggers the decomposition of NaN ₃ to form elemental sodium and nitrogen gas, which fills the airbag. How many moles of N ₂ gas is produced when 161.5 g
 NaN ₃ decomposes?