Mass of crucible with manganese dioxide 88.100g Mass of crucible with potassium chlorate 108.100g Mass of crucible after heating 100.267g What is the mass of the potassium chlorate? ( 12.267g)? What is the mass of oxygen in the sample of potassium chlorate?(14.136g) What is the mass percent of oxygen in potassium chlorate? (39.15%)? My calculations are in the parenthesis just want to make sure they are correct ?

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