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snow_tiger [21]
2 years ago
6

Which action best demonstrates the transformation of mechanical energy to heat energy?

Chemistry
2 answers:
puteri [66]2 years ago
5 0

The Best action which Demonstrates the Transformation of Mechanical Energy to Heat Energy is Rubbing Hands vigorously

Option C is the Answer

Murrr4er [49]2 years ago
3 0

I think the answer is C    

:)

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How many electrons will a neon (Ne) atom have when it has no charge?
Darya [45]

Answer:

hope it helps you

Explanation:

Once one shell is full, the next electron that is added has to move to the next shell. So... for the element of NEON, you already know that the atomic number tells you the number of electrons. That means there are 10 electrons in a neon atom.

6 0
3 years ago
Which of the following is not an example of a subatomic particle? electron photon neutron proton
asambeis [7]
I'm pretty sure all 4 are subatomic particles but if i had to guess i'd be Photons
5 0
3 years ago
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For a process Arightwards harpoon over leftwards harpoonB, at 25 °C there is 10% of A at equilibrium while at 75 °C, there is 80
Lostsunrise [7]

This question is describing the following chemical reaction at equilibrium:

A\rightleftharpoons B

And provides the relative amounts of both A and B at 25 °C and 75 °C, this means the equilibrium expressions and equilibrium constants can be written as:

K_1=\frac{90\%}{10\%}=9\\\\K_2=\frac{20\%}{80\%}  =0.25

Thus, by recalling the Van't Hoff's equation, we can write:

ln(K_2/K_1)=-\frac{\Delta H}{R}(\frac{1}{T_2} -\frac{1}{T_1} )

Hence, we solve for the enthalpy change as follows:

\Delta H=\frac{-R*ln(K_2/K_1)}{(\frac{1}{T_2} -\frac{1}{T_1} ) }

Finally, we plug in the numbers to obtain:

\Delta H=\frac{-8.314\frac{J}{mol*K} *ln(0.25/9)}{[\frac{1}{(75+273.15)K} -\frac{1}{(25+273.15)K} ] } \\\\\\\Delta H=4,785.1\frac{J}{mol}

Learn more:

  • brainly.com/question/10038290
  • brainly.com/question/19671384
5 0
3 years ago
Why do planets in our solar system stay in their positions
Anon25 [30]
This is not chemistry but it's A, off top.

4 0
3 years ago
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Look at the diagram. Which shows the correct arrangement of electrons in water?
mariarad [96]

Answer:

Option 4

Explanation:

In water molecule, oxygen has -2 charge on it while the hydrogen has +1 charge and one atom of oxygen combines with two hydrogen atoms. A hydrogen need only two electrons to complete its octet (one electron is its own the second electron is shared by oxygen) and a oxygen needs 8 electrons (It has six of its own and two are shared by two hydrogen atom).

Hence, option 4 is correct

6 0
3 years ago
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