describe how a solid sample of calcium sulphate can be prepared using dil nitric v acid dil sulphuric vi acid and solid calcium carbonate​

In an energy pyramid, which level has the most available energy?

When a nucleus absorbs a neutron and then breaks apart, there are many products of the reaction. what is not a product of a nuclear fission reaction

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?