Answer:
4.17
Step-by-step explanation:
The balanced chemical equation for the reaction of NaN3 to form N2 is:
2 NaN3 -> 3 N2 + 2 Na
This equation shows that 2 moles of NaN3 produce 3 moles of N2. We can set up a proportion to find out how many moles of NaN3 are needed to make 6.25 moles of N2:
2 moles of NaN3 : 3 moles of N2 = x moles of NaN3 : 6.25 moles of N2
To solve for x, we can cross-multiply and simplify:
2 × 6.25 moles of NaN3 = 3 × x
12.5 moles of NaN3 = 3x
x = 12.5 / 3 = 4.17 moles of NaN3
Therefore, 4.17 moles of NaN3 are needed to make 6.25 moles of N2.