Potassium nitrate decomposes on heating, producing potassium oxide and gaseous nitrogen and oxygen:
4KNO3(s) ⟶2K2O(s) + 2N2(g) + 5O2(g)
To produce 56.6 kg of oxygen, how many moles of KNO3 must be heated?
So, we have the mass of oxygen gas (product) in kg and we need to find out the number of moles of KNO3 (reactant) from it.
First, let’s have a look at the data.
We will solve this problem through these steps: