Top- First Step: 1. Convert grams of NaN3 to moles using its molar mass. 2. Use the mole ratio between NaN3 and N2 to find moles of N2 produced. 3. Convert moles of N2 to grams using its molar mass.
Bottom-Last Step: 4. Calculate the grams of nitrogen produced by multiplying the moles of N2 by its molar mass.