What is the function of manganese(IV) oxide in the thermal decomposition reaction of potassium chlorate (KClO3)?

Calculate the mass of oxygen that will be prepared through the decomposition of 50 kg of potassium chlorate ( KClO3 , Molar mass= 122.55 g/mol)2 KClO3 → 2 KCl + 3 O2

You found a container with a white substance labeled MCIO, but you do not know which Group 1 metal M represents. You decide to use your chemistry wizardry to identify this mystery substance. You dissolve 5.00 g in enough water to produce 250. ml of the solution (Solution A). You decompose the chlorate according to the following reaction: 2MCIO3 (ag) -> 2MCI (ag) + 3 0, (g)AHrn =-140.2 kJ1. You collect the 02 produced and it has a volume of 1.53 L at a temperature of 25.0 °C and 0.980 atm.(a)

(a) (i) (ii) (iii) With the aid of a simple schematic, explain what covalent bonding is and how it is formed. What are the differences between a covalent bond and an ionic bond? Which type of bond is found in crystalline silicon? At room temperature do you expect an ionic crystal to be a good electrical conductor or a good electrical insulator? Explain why.