Uses of de-Broglie equation in electromagnetic specra.

a. What is the maximum wavelength of energy needed to observe a photoelectric effect for potassium?

b. What is the corresponding color of light of this wavelength?

Calculate the mass of oxygen and decomposed potassium chlorate along with the pressure in the glass bulb.

Oxygen can be produced in the laboratory by the thermal decomposition of potassium chlorate:

KC1O₃ (c) → KC₁(s) + 3/2 O₂ (g)

Some potassium chlorate is decomposed and the Oxygen produced is collected over water at 25⁰C and 780 torr total pressure. A total of 510 mL of gas is collected.

1.Determine the mass of oxygen Collected.

2.Calculate the mass of KC1O₃ which was decomposed.

3.The Oxygen collected in this experiment is dried thoroughly to remove all traces of water vapour and stored in a 300. mL glass bulb at 55⁰C. Calculate the pressure inside the bulb.