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kaheart [24]
3 years ago
6

Fireworks are chemical reactions that release energy. Which of these phenomena are caused by chemical reactions that release ene

rgy? If you’re not sure, make a guess. Muscles work to perform a task. Fuel burns and heats the surroundings. A battery supplies current to a device. A car's air bag expands by igniting a chemical.
Chemistry
2 answers:
Gemiola [76]3 years ago
6 0

All the answers are correct.

Annette [7]3 years ago
4 0
I think it is either the second or third one.
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3 years ago
How much energy would be released as an electron moved from the n=4 to the n=3 energy level?
Thepotemich [5.8K]

The energy released when electron move from n=4 to n=3 is 0.66 eV

We know that in an atom energy of nth state is

                                     E_n =  -13.6/n^{2}  eV

where n is the energy level

Therefore,

                   E_4 = -13.6/4^{2} \\E_3  = -13.6/3^{2}

Thus, E_4  =   -0.85eV

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Therefore, total mount of energy released in moving electron from n=4 to n=3 is given by -

                                       E_4 -E_3

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                                   = 0.66eV

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2 years ago
Which state of matter has the lowest amount of themeral energy?
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Answer:

Matter in its solid state has the lowest amount of thermal energy (for that type of matter). Because solids have less thermal energy than liquids or gasses, the atoms in their solid state move very little.

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