the reaction of MnO2(s)+4HCl(aq)--- MnCl2(aq)+Cl2(g)+H2O(l) was being studied.12.2g of MnO2 were reacted with 70 ml of 2.5 m HCl solution, the chlorine prod0.971 atm at temp of 78.2C

Answer 1

You’re missing the actual amount of chlorine collected. You can’t calculate a % Yield without it.