6. A 2.92 g sample of a KCl-KClO3 mixture is decomposed by heating. 89.8 mL of O2(g) is collected by displacement of water at a temperature of 22C and 727 mmHg. What is the mass percent of KCl in the mixture? The reaction is 2 KC103(s) 2 KC1(s) + 3 02(g) (90.3% KC1)