What volume of methanol should be used to make 1.25 L of a 21.0 % by volume solution?

0.2625L

Explanation:

Given parameters":

Volume of solution = 1.25L

Percentage concentration = 21%

Unknown:

Volume of methanol = ?

Solution:

The percentage concentration is one of the different methods for expressing concentration values.

It is given as:

              Percentage concentration =

Now we have to work backwards to derive the percentage concentration;

        let the unknown, the volume of methanol which is the solute  = P;

        21    =   x 100

              21 =

             21 = 80p

                    p   = 0.2625L

a chemical reaction

explanation:

both adhesion and cohesion are attractions.

they are different in that adhesion is the force of attraction between the molecules of two different substances, whereas cohesion is the force of attraction between molecules of the same substance.

possible examples include capillary action, in which the adhesion between water and glass causes the water to rise in a narrow tube against the force of gravity.

because of hydrogen bonding, water is extremely cohesive.

this causes molecules on the surface of water to be drawn inward, which is why drops of water form beads on smooth surfaces.

hope this .