Answer:
The answer to your question is 2.5 moles of Cl₂
Step-by-step explanation:
Data
moles of Cl = x
moles of Ag = 5 
Balanced chemical equation
 2Ag + 1Cl₂ ⇒ 2 AgCl
 Reactants Elements Products
 2 Ag 2
 2 Cl 2
Process
1.- Use the coefficients of the balanced reaction to solve this problem.
  2 moles of Ag -------------------- 1 mol of Cl₂
 5 moles of Ag ------------------ x
 x = (5 x 1) / 2
 x = 5/2
 x = 2.5 
2.- Conclusion
5 moles of Silver reacts with 2.5 moles of Cl₂