If 55.0 grams of KCIO3 is decomposed by the following equation, how many grams of oxygen can be produced?
2 KCIO3 > 2 KCL + 3 O2
Convert 55.0 g HClO3 to moles. moles = grams/molar mass.
Using the coefficients in the balanced equation, convert moles KClO3 to moles oxygen.
Now convert moles oxygen to grams. g = moles x molar mass. Post your work if you get stuck.