A student heats a 2.8594 gram sample of mixture that containsan unknown amount of Potassium ChlORATE (KClO3) in atest tube in the presence of some MnO2 catalyst. TheKClO in the mixture decomposes during the heating process ,releaisng its oxygen. After the sample has cooled the student findsthe mass of the sample residue to be 2.2103 grams.
1. How many grams of oxygen atoms were in the KClO3 inthe original sample?
2. How many moles of oxygen atoms is this?
3. How many moles of KClO3 must have been in theoriginal sample?
4. How many grams of KClO3 must have been in theoriginal sample?
5. What is the % of KClO3 in the original sample?