Determine the limiting reagent in Mg(s)+2HCl(aq)= MgCl2(aq)+H2(g)

Answer 1

One easy way to find the limiting reagent in a chemical reaction is to divide the moles of each reactant by the corresponding coefficient in the balanced equation. Whichever value is lowest represents the limiting reagent. Unfortunately, in the current problem you don't supply the mass or moles of the reactants, so we cannot determine the limiting reagent.