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Alex Ar [27]
2 years ago
7

What are five kinds of evidence you can use to determine if a chemical reaction has occurred?

Chemistry
1 answer:
telo118 [61]2 years ago
5 0
Change of odor, change of color, change of temperature, change of energy, or loss of heat
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A salt solution will conduct electricity but if sugar solution will not explain why​
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Salt solution such as sodium chloride (NaCl) conducts an electric current because it has ions in it that have the freedom to move about in solution. ... On the other hand, sugar solution does not conduct an electric current because sugar (C12H22O11) dissolves in water to produce sugar molecules
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Complete the chart. (Remember to enter a 0 if necessary.)
Trava [24]
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2 years ago
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4 0
3 years ago
During cooling, the kinetic energy of the molecules falls. Why does this happen?
katrin [286]

<span>During cooling, the kinetic energy of the molecules falls, be</span>cause, when cooling a substace, the particles (molecules) slow down.


The kinetic energy is related to the speed, such that the lower speed the lower kinetic energy.


Particles can translate and vibrate, in the case of gases and liquids, and only vibrate (in the case of solids).


As a substance is cooled the particles get closer and the motion (translation and vibration), slows down. You can see by the equation of the kinetic energy (KE):


KE = [1/2]mass×(speed)² that as the speed is lower the KE will also be lower.


Additionally, when the cooling does not drive a change of phase (gas to liquid, liquid to solid, or solid to gas), it drives a decrease on temperature. In this case you should know that the temperature is a measure of the kinetic energy: the lower the temperature, the lower the kinetic energy.




3 0
3 years ago
Read 2 more answers
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