Potassium perchlorate, KCLO4, decomposes on heating to form potassium chloride and elemental oxygen.
The following data were collected:
mass of sample before heating: 2.6865g
mass of residue after heating: 2.0475g
volume of water displaced: 516mL
atmospheric pressure: 750.7torr
water temperature: 27.0 degrees C
a) write a balanced molecular equation for the thermal decomposition of potassium perchlorate.
b) what is the % of KClO4 in the sample being heated?
c) what volume would this sample of oxygen occupy if collected at STP?
d) what is the molar volume at STP of O2 according to this data?