Practice i. four standard solutions of a hydrated copper complex are prepared from a 5.0 m stock solution. each standard solution is prepared by measuring a different volume of stock (indicated in the table below) that is diluted to a volume of 10.00 ml·the absorbance of each standard solution is measured at 610 nm and the absorbance is recorded in the data table below. the absorbance of a hydrated copper complex of unknown concentration is measured to be 0.579. calculate the concentration of each of the four standard solutions and determine the concentration of the unknown solution. volume of concentration of 5.0 m stock 10.00 ml standard standard 0.40 ml 0.60 ml 0.80 ml 1.00 ml absorbance 0.31 0.49 0.67 0.84 2 2. four standard solutions of potassium permanganate (kmno,) are prepared from a 1.00 mm stock solution. each standard solution is prepared by measuring a different volume of stock (indicated irn the table below) that is diluted to a volume of 25.00 ml. the absorbance of each standard solution is measured at 520 nm and is recorded in the data table below. the absorbance of an unknown kmno solution is measured to be 0.153. calculate the concentration of each of the four standard solutions and determine the concentration of the unknown solution. volume of standard 1.0 mm stock concentration of 25.00 absorbance ml standard 0.50 ml 1.00 ml 2.50 ml 5.00 ml 0.053 0.101 0.252 0.461

water   molecules stay close to each other through cohesion, the collective action of hydrogen bonds between water molecules. cohesion plants draw water upwards from the root through the stem's transport tubes (xylem) to the leaf. this transport occurs even in large trees and against gravity. transpiration, evaporation of water from plant leaves, creates a tension on water molecules being pulled up from the stem and roots.

water also has high (the attraction of one substance to another) properties because of its polar nature. adhesion of water molecules to plant cell walls counteract gravity while water is transported from roots to leaves.

water exhibits a very high surface tension when compared to other liquids. surface tension is a property of a liquid that holds the surface together and allows it to resist an external force. by capillary action, the water forms concave menisci inside the pores. the high surface tension of water pulls the concavity outwards, generating enough force to lift water from the roots to the leaves of plants.

thus, cohesion, along with adhesion and surface tension creates a capillary action that keeps water molecules interacting and moving through the plants out to the leaf cells.

therefore, option d) is the correct answer.

explanation:

state the principle of separating two immiscible liquids by separating funnel. describe an activity with diagram to separate a mixture of water and kerosene oil. answer: immiscible layers separate out in layers depending on their densities in separating funne

one negative thing it that it can kill water animals. another negative thing is it can cause the destruction of ecosystem. one way water pollution can be reduced is to conserve energy.