determine the of kclo3 in a mixture

/in /by

**ONLY NEED HELP WITH LAST THREE QUESTIONS. I FIGURED OUT ALL THE OTHER ANSWERS BUT DON’T KNOW HOW TO DO THE LAST THREE**

Mass of empty test tube: 20.191g

Mass of test tube and sample before heating: 20.794g

Mass of test tube and sample after heating: 20.613g

ID number of unknown: 1

Mass of unknown sample that was heated: 0.603g

Mass of oxygen produced: 0.181g

Moles of oxygen produced: 0.011g

Moles of KClO3 decomposed(mass of KClO3 in sample) ???

Mass of KClO3 decomposed (mass of KClO3 in sample)???

Percentage of KClO3 in sample ???

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