[warriorchick1506]

I have a few questions on my homework that I can't figure out where to start!
This is an example:
What is the percent yield when 44.0L of NO gas is produced from 50.0 L of ammonia gas and 60.0 L of oxygen gas?

here is another that isn't L.
When heating 1.55g of potassium chlorate, a student releases 0.619 g of oxygen gas, leaving solid potassium chlorite. what is th epercent yield.?
Any help on these would be great! thanks!

[Borek]

Calculating theoretical is in both cases a simple stoichiomtery. Start with the reaction equations.

[tomgreenschic]

You can calculate theoretical yield by finding which is the limiting reactant.