Question

Calculate how many grams of O2(g) can be produced from heating 46.5 grams of KClO3(s).

Answer 1

\[\color{green}{\text{2KClO}_3 \rightarrow 3\text{O}_2 + \text{2KCl}}\]
Find the number of moles of potassium chlorate.

Next, determine the number of moles of oxygen that will be produced. Note that every two moles of potassium chlorate decomposes to produce three moles of oxygen gas. Set up a proportion to find the number of moles of oxygen produced once you know how many moles of potassium chlorate you have.

Finally, convert the number of moles of oxygen to mass.