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professor190 [17]
3 years ago
12

Help Pls thnk you !!!!!!!!!!!!!!!!!!!!!!!!!

Chemistry
1 answer:
uysha [10]3 years ago
3 0
The answer is double displacement is the answer
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A. Thermal energy good job
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sleet_krkn [62]

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Magnesium and calcium belong to the second group i. e. alkaline earth metals. They are known as earth metals because they are extracted from the earth. They are very reactive elements. Their reactivity increases when we go from top to bottom because the outermost electrons goes farther from the nucleus i. e. atomic radius increases so less energy is needed for its removal.

8 0
3 years ago
Select the correct answer.
Minchanka [31]

Answer:

A.   it is the lowest at low temperatures

Explanation:

It is true with respect to the kinetic energy of a molecule that the it is the lowest at low temperatures.

The kinetic energy of a molecule is the energy due to the motion of the particles within a substance.

  • Kinetic energy is directly proportional to the temperature of a substance.
  • The higher the temperature, the more the kinetic energy of the molecules within a system.
  • At low temperature, kinetic energy is the lowest.
  • At the highest temperature, kinetic energy is the highest
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3 years ago
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Guys, look at the images. I'm so stuck, and I feel as if my brain is about to get ripped out.
Rama09 [41]

Answer:

You not alone lolI'm also tryna figure out the answer

3 0
2 years ago
Electromagnetic waves will travel the SAME SPEED (speed of light) WITHIN a medium as it does WITHOUT a medium. Question options:
Marrrta [24]

Answer:

True

Explanation:

The speed that electromagnetic waves will travel within any medium is the same as those without a medium. The speed of electromagnetic wave is a constant and does not depend on the material of the medium.

  • Electromagnetic waves are waves that do not require a material medium for their propagation.
  • They are able to pass through vacuums and mediums with particles at constant speed.
  • It is mechanical waves whose speed is medium dependent.
  • Mechanical waves have varying speed based on the mediums they move through.
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