October 9, 2015

Homework Help: chemistry

Posted by help on Tuesday, October 4, 2011 at 12:37pm.

An unknown mixture containing KClO3 was added to an ignition tube weighting 41.960g, The tube and mixture was then found to weight 43.772g. After the first heating, the tube and its contents weighed 43.621g.
After the second and third heatings, it weighed 43.332g.

1)What mass of oxigen was liberated from the unknown mixture?
2)what mass of KClO3 was contained in the original mixture?
3)what was the percentage of KClO3 in the original mixture?

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