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Minchanka [31]
3 years ago
9

Using your knowledge of the reflection, absorption, and transmission of mechanical waves, Why do you think the foam is used, and

how do you think it functions?
Chemistry
1 answer:
Nata [24]3 years ago
3 0
I think you forgot to put the image
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Assuming constant pressure, rank these reactions from most energy released by the system to most energy absorbed by the system,
defon

Answer:

C: The surroundings heat up and the system decreases in volume.

D: The surroundings heat up and the system does not change volume.

B: The surroundings heat up and the system expands in volume.

A: The surroundings get cold and the system decreases in volume.

Explanation:

The most exothermic reactions are those that release heat, that is to say, they give up the heat as it cools and the surroundings heat up.

As for endothermics, that is, those that absorb or capture the heat of the medium, they are variables that cool the environment that surrounds them and increase their internal temperature

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When KCl dissolves in water:
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This dissociation occur because:

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that leaves a H and a Cl, which one has a positive charge and the other has a negative, so they will bond and form Hydrochloric Acid.

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What are Valence Electrons?
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The value of an element that is used is the molar mass. An isotope is another form of the element. The difference is there are different number of protons in each isotope. Molar mass is a unit to measure the mass of the substance over the amount of substance in terms of moles. 

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A boy weighing kilograms is riding a skateboard. He’s moving at 2 meters/second and has 40 joules of kinetic energy. He doubles
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80 is the correct answer i think I'm not sure

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