What is the mass of hcl that would be required to completely react with 5.2 grams of mg

Balanced chemical equation :

2 HCl + Mg = H2 + MgCl2

2 x 36.5 g 24.30 g Mg
 Mass HCl g 5.2 g Mg

5.2 x 2 x 36.5 / 24.30 =

Therefore:

379.6 / 24.30 => 15.62 g of HCl 

Sorry i dont understand the question can you rephase it?

Answer is: the equilibrium  shifts toward the reactants, to the left side of chemical reaction.it is because lead(ii) nitrate dissociates in water: pb(no₃)₂ → pb²⁺(aq) + 2no₃⁻(aq).according to lechatelier's principle, the position of equilibrium moves to counteract thechange (more lead cations, common ion), the position of equilibrium will move so that the concentration ofproducts decrease and concentration of reactants of chemical reaction increase.read more on -