What is the wavelength of 1.2*1015hz

Explain what happens at the saturation point when adding salt to water at room temperature.

Tell me the iupac names of the following alcohols:

Which of the following natural processes is most likely to support the formation of an underwater sinkhole? a pollution buildup from deposited minerals b limestone cave collapsing due to changes in sea level c erosion of large amounts of sand moved by ocean waves d oxidation of rock formed by chemical weathering