(a) Calculate the energy of a single photon of light with a frequency of 3.03*10^8 s-1. Energy = J
(b) Calculate the energy of a single photon of red light with a wavelength of 681 nm.
Energy = J

Akno3 solution containing 51 g of kno3 per 100.0 g of water is cooled from 40 ∘c to 0 ∘c. what will happen during cooling?

What is the most common reason for matter changing its state?

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth