Question

Sodium (Na) reacts with nitrogen gas (N2) to produce sodium nitride. If a student collects 2.5 moles of sodium nitride (NaN3) after the reaction has been completed, determine the number of moles of nitrogen that were initially present.

2Na + 3N2 -> 2NaN3


Your answer:


3.75 mole N2



1.2 mole N2



3.87 mole N2

Answer 1

1.67 moles of N2 produce 2.5moles of NaN3

Step-by-step explanation:

Equation of reaction:

2Na + 3N₂ → 2NaN₃

From the equation of reaction, 3 moles of N₂ produces 2 moles of NaN₃

How much is gotten from 2.5moles of 2NaN₃?

2 moles of N₂ = 3 moles of NaN₃

X moles of N₂ = 2.5 moles of NaN₃

X = (2.5 × 2) / 3

X = 1.67moles of N₂

1.67 moles of N₂ produces 2.5moles of NaN₃