Final answer:
Hydrogen peroxide is available in various concentrations for use as a disinfectant, commonly at 3%, and decomposes to water and oxygen gas.
Step-by-step explanation:
Hydrogen peroxide H2O2 solution can typically be purchased in drug stores at various concentrations, often for use as a disinfectant. Common concentrations include 3%, which is widely used for household disinfection due to its effectiveness and affordability. When hydrogen peroxide decomposes, it yields water and oxygen gas, a reaction that can be represented by the chemical equation: 2H2O2 (aq) → 2H2O(l) + O2(g). For a 6.00 kg, 3.00% by mass H2O2 solution, one must calculate the gram amount of hydrogen peroxide needed based on the total weight of the solution and the desired percentage concentration.