When 86.5 g of calcium chlorate decomposes into calcium chloride and oxygen, how many grams of oxygen are produced? Ca(ClO3)2 → CaCl2 + O2

40.1 g

Explanation:

The balanced equation is:

First we convert 86.5 g of calcium chlorate into moles, using its molar mass:

Then we convert Ca(ClO₃)₂ moles into O₂ moles, using the stoichiometric coefficients of the balanced reaction:

Finally we convert O₂ moles into grams:

h let me think