The reaction of 0.25 g magnesium with 100 mL of 1 M hydrochloric acid (density d = 1.02 g/ml) raises the temperature of the solution from 20 °C to 35 °C . The specific heat for HCl is 3.93 J/(g.C).
Mg (s) + 2HCl (aq) MgCl2 (aq) + H2 (g)
Which one of the reagents is the limiting one?