What is the percent purity of a sample of iron ore if 1.25g of sample, when reacted with an excess of HCl, produces 220 mL of H2gas collected over water at a total pressure of 1.00atm and 26 degrees C? The vapor pressure of water at this temperature is 25mmHg. The reaction is:2Fe + 6HCL = 2 FeCl3 +3H2