Homework Help: Chemistry

Posted by Sam on Saturday, April 16, 2011 at 8:46pm.

If 237 mL of O2, measured at STP, are obtained by the decomposition of the KClO3 in a 5.44 g mixture of KCl and KClO3,
2KClO3(s)-->2KCl(s)+3O2(g)
what is the percent by mass of KClO3 in the mixture?

Chemistry - DrBob222, Saturday, April 16, 2011 at 9:51pm
%KClO3 = (mass KClO3/mass sample) x 100 = ??
mass KClO3 = what?
0.237 g O2 x (1 mole O2/22.4L O2) x (2 moles KClO3/3 moles O2) x (122.6 g KClO3/mole KClO) = grams KClO3.
Chemistry - Anonymous, Saturday, June 4, 2011 at 11:06pm
mass percent of oxygen in potassium chlorate:
Chemistry - Anonymous, Tuesday, October 9, 2012 at 3:08pm
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