Assuming that the densities of the toluene and polystyrene are 0.867 g/cm3 and 1.05 g/cm3 , calculate the following: (a) The number average molar mass for the sample of polystyrene (b) An estimate of the Flory-Huggins polystyrene-toluene interaction paramet

i believe it is c.) 1575 j.

i just learnt this recently but i need to look through my notes again

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

може ли да зареждате повече информация, моля