Answer :
Final answer:
Upon decomposition, 36.9 g of oxygen and 57.3 g of potassium chloride are produced from 100.0 g of potassium chlorate, leaving 5.8 g of unreacted potassium chlorate.
Explanation:
The decomposition of potassium chlorate (KClO₃) into potassium chloride (KCl) and oxygen (O₂) can be represented by the chemical equation:
2 KClO₃(s) → 2 KCl(s) + 3 O₂(g)
Given that 100.0 g of potassium chlorate was initially present and upon heating, 36.9 g of oxygen and 57.3 g of potassium chloride were produced, we can calculate the mass of potassium chlorate that remains unreacted by subtracting the sum of the masses of the products from the initial mass of the reactant:
Mass of unreacted potassium chlorate = Initial mass of KClO₃ - (mass of O₂ + mass of KCl)
Mass of unreacted potassium chlorate = 100.0 g - (36.9 g + 57.3 g)
Mass of unreacted potassium chlorate = 100.0 g - 94.2 g
Mass of unreacted potassium chlorate = 5.8 g