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shepuryov [24]
3 years ago
7

What is the name of the compound Cd(MnO4)2?

Chemistry
1 answer:
allochka39001 [22]3 years ago
5 0
C ) cadmium permanganate
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What makes science reliable
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Why can you change physical properties and not make a new substance but can't change chemical properties and stay the same?
maxonik [38]

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Well this has a good chance of being wrong but i wanna say,

When you change a physical property of something it doesn't affect the chemicals that make it up. Like Ice, you can freeze water to make ice. You change a physical property (state of matter) but it's chemical properties don't change because in the end it's still water.

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3 years ago
Question 13: Consider the strength of the Hβ absorption line in the spectra of stars of various surface temperatures. This is th
finlep [7]

Answer:

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Atoms possess distinct energy levels and these levels of energy are constant, that is, the temperature has no influence on it. However, temperature possesses an influence on the electron numbers found within these levels of energy. Therefore, to generate an absorption line of hydrogen in the electromagnetic spectrum's visible band, the electrons are required to be present in the second energy level, that is when it captivates a photon.  

Therefore, after captivating the photons the electrons jump from level 2 to level 4, which shows that there is an increase in the stellar surface temperature and at the same time one can witness a decline in the strength of the H-beta lines. In case, if the temperature of the surface increases too much, then one will witness no attachment of electron with the hydrogen atom and thus no H lines, and if the temperature of the surface becomes too low, then the electrons will stay in the ground state and no formation of H lines will take place in that condition too.  

Hence, to generate a very robust H line, after captivating photons the majority of the electrons are required to stay in the second energy level.  

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3 years ago
The two largest metropolitan areas in Canada are Toronto and
vaieri [72.5K]
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