Asample of aluminum metal absorbs 8.32 j of heat, upon which the temperature of the sample increases from 23.2 degrees c to 30.5 degrees c. since the specific heat capacity of aluminum is 0.90 j/g-k, the mass of the sample is what in grams?

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?