Question

I wont to get concentartion by using A weight of chemical material and chemical formula.

Answer 1

You can do it in mass percent (w/w), w/v, or molarity or molality.
For molarity, weigh out 1 mole of the material, add to a 1L volumetric flask, add some solvent, swirl until all of the solid is dissolved, then make to the mark with solvent.