What is the wavelength of light with a frequency of 3.3x10^14 Hz?

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

Which factor is likely to impact the possible number of compounds ?

Alidded glass container is filled with a colored gas. after a period of time, it is observed that the gas is uniformly spread throughout the box and that the movement has slowed considerably. next, a warm iron plate is carefully placed under the box. why is there resumed movement of the gas in the container?