Iwant to develop a program which will calculate the 'proof of an ethanol mixture. you're too young to appreciate this. but the 'proof of a commercial alcohol is double the volume percentage of the ethanol in the solution. a pure ethanol solution would be 200 % proof, but this is not possible using standard distillation methods (for technical reasons you'll learn in your separations class), nor is it a good idea (for reasons you'll learn after you tum 21) we will calculate the 'proof based on the user's input of mass of pure water and the mass of pure ethanol added to the solution. associate this program witha button on a worksheet. ask the user to input the mass of water in grams and the mass of ethanol in grams in an input box. set a variable for all constants used in the program (things like density, molecular weight etc). calculate the proof of the solution and report it back to the user in a message box.

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:

i think it's letter a.

it's 3.2 on edge, i just took the test.