In what layer of the skin is melanin found? what does melanin do for skin cells?

Plz choose one of the compounds from the table and explain how you know the numbers of atoms in your formula. is it possible for two different compounds to be made from the exact same two elements? why or why not? with a limited number of elements (less than 120 are known), does this mean we also have a small number of compounds or do we have a large number of compounds in this world?

Which statement best describes what happens when molecular compounds melt

What happens to the temperature of a substance when the average kinetic energy of its particles increases?