How much copper sulphate will be precipitated out when 30 gm of its saturated solution cooled down from 30°C to 20°C.? The solubility of copper sulphate is 35 at 30°C and 21
20°C.
(An: 3.11gm

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).

Hello.the answer is  hydrosphere, geosphere, and biosphere  have a nice day