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Inessa05 [86]
3 years ago
15

Why are polar bears listed as a threatened species?

Chemistry
2 answers:
Jlenok [28]3 years ago
8 0
Because of global warming, as our ozone layer gets disrupted the ice caps are melting and the polar bear have no where to go
IceJOKER [234]3 years ago
5 0
Because their species is in danger of going extinct<span />
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The number of electrons in n=1 and n=2 shells of aluminum are
harina [27]

Answer:

n=1 holds two electrons and n=2 holds eight electrons.

Explanation:

Hello

In this case, since the atomic number of aluminum is 13, its electron configuration is:

Al^{13}: 1s^2,2s^2,2p^6,3s^2,3p^1

In such a way, we can see that the level n=1 is filled with two electrons since the subshell s is able to hold two electrons and the level n=2 is also filled but with eight electrons as s holds two whereas p holds 6. Moreover, n=3 is holding three electrons.

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Which compares the problem associated with radioactive waste created from generating electricity using fusion reactions to waste
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2 years ago
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nydimaria [60]

Answer:The correct answer is option (C).

Explanation:

Zn+CuCl_2\rightarrow Cu+ZnCl_2

After the reaction between Zinc and copper(II) chloride, Zinc chloride and copper will be obtained as a product. This reaction occurs because zinc is more reactive than copper which displaces the copper from its aqueous solution.

The student will expect to find copper metal at bottom of the beaker with aqueous solution of zinc chloride.

Hence the correct answer is option (C).

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What liquid is the most vicious ?
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