You're asking for the chemical equation of a reaction between iron(II) sulfate (FeSO₄) and ammonia (NH₃). However, you need to specify what the "plus?" represents. This is important because the reaction can take different paths depending on the additional reactant and the conditions.

Here are a few possible scenarios:

1. Reaction with water:

* FeSO₄(aq) + 2 NH₃(aq) + 2 H₂O(l) → Fe(OH)₂(s) + (NH₄)₂SO₄(aq)

This reaction forms a precipitate of iron(II) hydroxide (Fe(OH)₂) and ammonium sulfate ((NH₄)₂SO₄). This is a common reaction in aqueous solutions where ammonia acts as a weak base.

2. Reaction with oxygen (air):

* 4 FeSO₄(aq) + 8 NH₃(aq) + O₂(g) + 2 H₂O(l) → 2 Fe₂O₃(s) + 4 (NH₄)₂SO₄(aq)

In the presence of oxygen (air), iron(II) sulfate can be oxidized to iron(III) oxide (Fe₂O₃), forming a brown precipitate. This reaction also produces ammonium sulfate.

3. Reaction with a strong acid:

* FeSO₄(aq) + 2 NH₃(aq) + 2 HCl(aq) → FeCl₂(aq) + (NH₄)₂SO₄(aq)

Adding a strong acid like hydrochloric acid (HCl) will react with ammonia, forming ammonium chloride (NH₄Cl) and leaving iron(II) chloride (FeCl₂) in solution.

To give you a precise chemical equation, please specify what the "plus?" represents.