how many moles of ammonia (nh₃) will be produced from 3 moles of nitrogen?

Explanation:

Step1: Write the balanced chemical equation

$N_2 + 3H_2\rightarrow 2NH_3$

Step2: Determine the mole - ratio

The mole - ratio of $N_2$ to $NH_3$ is 1:2.

Step3: Calculate moles of $NH_3$

If we have 3 moles of $N_2$, and the mole - ratio of $N_2$ to $NH_3$ is 1:2, then the moles of $NH_3$ produced is $3\times2 = 6$ moles.

Answer:

6 moles