Homework Help: Chemistry - please help!

Posted by Alex on Tuesday, May 8, 2012 at 12:31am.

The decomposition of KClO3 produces oxygen gas and solid KCl. What mass of KClO3 must be decomposed to produce 126 L of oxygen gas at 133 Celsius and .88 atm?

I know I need to use PV=nRT but I can't figure out how.

Chemistry - please help! - DrBob222, Tuesday, May 8, 2012 at 12:47am
Here is a worked example on the decomposition of KClO3. To convert 126 L O2 to n = mols, use PV = nRT and solve for n, then follow the instructions beginning with step 3.
http://www.jiskha.com/science/chemistry/stoichiometry.html
Chemistry - please help! - Alex, Tuesday, May 8, 2012 at 1:12am
thank you!

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