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AlekseyPX
2 years ago
7

Which of the following is NOT a sign of a chemical reaction?"

Chemistry
1 answer:
irakobra [83]2 years ago
3 0

Answer:

C. water freezes (is the answer)

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Write an electron configuration for an atom of aluminum-27 in an excited state
andrew11 [14]
Ground state of Al  is 1s²2s²2p⁶3s²3p¹.
Exited state of Al is 1s²2s²2p⁶3s¹3p².
8 0
3 years ago
Read 2 more answers
Air containing 20.0 mol% water vapor at an initial pressure of 1 atm absolute is cooled in a 1- liter sealed vessel from 200°C t
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Answer:

This solution is quite lengthy

Total system = nRT

n was solved to be 0.02575

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= 0.00515

Nair = 0.0206

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I used antoine's equation to get pressure

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Grams of condensed water = 0.07994

Please refer to attachment. All solution is in there.

6 0
3 years ago
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Answer:

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Ba(NO3)2<br> What’s the atomic mass
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If fluorine 20 undergoes beta decay , what will it become ?
e-lub [12.9K]
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Ok now the reaction.

 20       20        0
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Remember the atomic number determines the nature of the element ( i.e what elemnt it is).
Hope this helps :).
7 0
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