A student prepared a stock solution by dissolving 20.0 g of NaOH in enough water to make 150. mL of solution. She then took 15.0 mL of the stock solution and diluted it with enough water to make 65.0 mL of a final solution. What is the concentration of NaOH for the final solution? A) O. 411 M
B) 0.534 M
C) 1.87 M
D) 2.43 M

0.7692 M

Explanation:

= Mass of sample =

= Volume of solution =

= Initial volume taken out of the stock solution =

= Molar mass of NaOH =

= Final volume of solution =

Molarity of stock solution is given by

The concentration of NaOH for the final solution is 0.7692 M

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 .

plasma is the state of matter where the substance is ionized and has no definite shape or volume. the fact of being ionized makes the substance a good electrical conductor.