Use the drop-down menus to complete each sentence about how the Sun’s energy travels through the atmosphere. The absorbs ultraviolet light. Most of the Sun’s energy hits directly. Dust particles short wavelengths, causing the color of the daytime sky.

If a molecule with a molecular formula of c13h18 is treated with an excess of h2 in the presence of finally divided pt metal under conditions required for maximum hydrogenation of the molecule to give a molecule with a formula c13h24, how many rings are in the molecule?