Attraction between polar molecules (dipoles) having permanent charge separation​

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

Astudent reacts 13 moles of iron with 21 moles of oxygen according to the following equation:

Which statement is true about the model of the electromagnetic spectrum a: it change the frequencies of light. b: it compare wavelengths of light. c: the color of light waves can be changed using the model. d: the intensities of light waves can be decreased using the model.