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2 years ago

What is the application of the emission spectra regarding elements?

1 answer:

8 0

The emission spectrum of a chemical element or chemical compound is the spectrum of frequencies of electromagnetic radiation emitted due to an atom or molecule making a transition from a high energy state to a lower energy state. The photon energy of the emitted photon is equal to the energy difference between the two states. There are many possible electron transitions for each atom, and each transition has a specific energy difference. This collection of different transitions, leading to different radiated wavelengths, make up an emission spectrum. Each element's emission spectrum is unique. Therefore, spectroscopy can be used to identify elements in matter of unknown composition. Similarly, the emission spectra of molecules can be used in chemical analysis of substances.

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What occurs when ions from the the sun strike air molecules

damaskus [11]

Auroras occur when ions from the Sun strike air molecules, causing them to give off bright colors of light.-google

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3 years ago

Identify the examples of diffusion in the list below

Sergeu [11.5K]

Answer:

movement of particles of object from one place to another

e.g

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Explanation:

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3 years ago

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Part C: complete the third column <br> Part D: complete the fourth column

Helga [31]

Answer:

Part C: P2 = 0.30 atm

Part D: V1 = 16.22 L.

Explanation:

Part C:

Initial pressure (P1) = 2.67 atm

Initial volume (V1) = 5.54 mL

Final pressure (P2) =.?

Final volume (V2) = 49 mL

The final pressure (P2) can be obtained as follow:

P1V1 = P2V2

2.67 x 5.54 = P2 x 49

Divide both side by 49

P2 = (2.67 x 5.54)/49

P2 = 0.30 atm

Therefore, the final pressure (P2) is 0.30 atm

Part D:

Initial pressure (P1) = 348 Torr

Initial volume (V1) =?

Final pressure (P2) = 684 Torr

Final volume (V2) = 8.25 L

The initial volume (V1) can be obtained as follow:

P1V1 = P2V2

348 x V1 = 684 x 8.25

Divide both side by 348

V1 = (684 x 8.25)/348

V1 = 16.22 L

Therefore, the initial volume (V1) is 16.22 L

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2 years ago

What is the use of the crystallisation process?

ioda

to obtain pure salt from seawater.
in order to obtain pure crystals of a substance from an impure mixture.
obtain pure alum crystals from an impure alum.

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2 years ago

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svetlana [45]

Answer:

Explanation:

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2 years ago

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