Physics, 15.12.2019 02:31 chaitanyac90

Zora wants to dissolve a solute in a solvent quickly. which best describes what she should do?

a. decrease the pressure

b. decrease the surface area

c. shake it repeatedly

d. place in a refrigerator

Answers: 3

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Answers

Warm up the solvent, crush the solute into powder or small pieces if possible, drop it into the solvent, then agitate the whole thing (shake it or stir it) repeatedly during the dissolving process. (c)

Decreasing the surface area, or placing it in a refrigerator will both SLOW DOWN the dissolving process. I don't know what decreasing the pressure will do, but it's not often used as a way to speed up the process.

Answer from: jimennacastillo15

c.shake it repeatedly

Explanation:

In order to dissolve a solute in a solvent quickly, we need either to increase the temperature or to increase the surface of contact between the solute and the solvent.

Among the options given, we see that

c.shake it repeatedly

can help in make the reaction quicker: in fact, when we shake the compund, more particles of the solute will come in contact with more particles of the solvent. What we are doing, basically, is to increase the surface of contact between the solute and the solvent, so that the reaction will occur quicker.

Choice b) and d), instead, have the opposite effect: they slow down the reaction.

Answer from: Quest

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

Answer from: Quest

The correct answer is "c". it is "c" because melting is an endothermic change, and endothermic get's energy from surroundings.

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Zora wants to dissolve a solute in a solvent quickly. which best describes what she should do?

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