For the given reaction, how many moles of ammonia will result from 4.0 moles of nitrogen

4 moles N2 x (2 moles NH3/1 mole N2) = ??

To determine how many moles of ammonia will result from 4.0 moles of nitrogen, you need to use the stoichiometric coefficients from the balanced chemical equation.

Looking at the balanced equation:
N2(g) + 3H2(g) > 2NH3(g)

The coefficient in front of nitrogen (N2) is 1, which means that 1 mole of nitrogen reacts with 3 moles of hydrogen (H2) to produce 2 moles of ammonia (NH3).

Since you have 4.0 moles of nitrogen, you can use the stoichiometry to calculate the moles of ammonia produced.

(4.0 moles N2) x (2 moles NH3 / 1 mole N2) = 8.0 moles NH3

Therefore, 4.0 moles of nitrogen will result in the production of 8.0 moles of ammonia.