The instrument that shows the direction wind is blowing from is a what?

Two instruments that measure wind direction are the wind or weather vane and the wind sock.

Anemometers is an instrument that measures wind speed.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume