4. In the following reaction: 2NaN3 decomposes to form 2Na + 3N2. If 500 grams of NaN3 decomposes to form 320 grams of Na, how much Na is produced? 180 grams
320 grams
500 grams​

You must make the following conversions:
mass of NaN₃ → moles of NaN₃ → moles of Na → mass of Na
500 g NaN₃ ×
1
mol NaN₃
65.01
g NaN₃
= 7.69 mol NaN₃
7.69 mol NaN₃ ×
2
mol Na
2
mol NaN₃
= 7.69 mol Na
7.69 mol Na ×
22.99
g Na
1
mol Na
= 176.8 g Na
Using Mass of N₂
You must make the following conversions:
mass of N₂ → moles of N₂ → moles of Na → mass of Na
323.20 g Na ×
2
mol N₂
28.01
g N₂
= 11.539 mol N₂
11.539 mol N₂ ×
2
mol Na
3
mol N₂
= 7.692 mol Na
7.692 mol Na ×
22.99
g Na
1
mol Na
= 176.85 g Na

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