How many atoms of Cu in a mole of Cu2O

The correct answer would be b) volume versus temperature, because they are also directly proportional.

The main types of electromagnetic radiation. radio  waves have  the lowest frequencies  and  longest  wavelengths, while gamma  waves have highest frequencies  and shortest wavelengths. the wavelengths vary across the electromagnetic spectrum from about 10–15 m to more than 104 m.hope it !