1. Balanced Chemical Equation:

The balanced chemical equation for the reaction is:

FeCl₂ + 2NaOH → Fe(OH)₂ + 2NaCl

2. Mole Ratio:

The balanced equation shows that 1 mole of FeCl₂ reacts with 2 moles of NaOH.

3. Calculation:

Since you have 6 moles of NaOH, you can use the mole ratio to determine how many moles of FeCl₂ will react:

(6 moles NaOH) * (1 mole FeCl₂ / 2 moles NaOH) = 3 moles FeCl₂

Answer: 3 moles of FeCl₂ would be used up in the reaction.