Using the axes below, plot the curve of temperature of the indoor room from the time the temperature drops to the time that thermal equilibrium is reached. Assume that the heating has not been turned on.

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?