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3 years ago

Consider a bathtub filled with water, with a plug in the drain. How long would this be considered a closed system?

2 answers:

8 0

For a closed system, you need two things:
1) a conservation of mass within the boundaries of the system
2) the ability to freely exchange energy to & from the "closed" system with a surrounding external system

So, the answer is never, since your defining the "system" as the water within the bathtub, and an open bathtub is exposed to evaporation, which is not conserving mass within the defined "system".

bulgar [2K]3 years ago

7 0

Answer:

The answer is a few seconds

Explanation:

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Which of the following electron configurations gives the correct arrangement of the four valence electrons of the carbon atom in

Juliette [100K]

Answer:

D) $2s^12p^3$

Explanation:

Carbon.

The electronic configuration is -

$1s^22s^22p^2$

Thus, 2s orbital is fully filled and p orbital can singly filled 3 electrons. Thus, Carbon has 2 singly occupied orbitals.

But in methane, $CH_4$ it forms 4 bonds. So, 1 electron each from 2s orbital jumps to the next orbital in the p subshell.

Thus, the configuration is:-

$1s^22s^22p^2$

Thus, the valence electron configuration is:-

$2s^12p^3$

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2 years ago

Who is Alfred Wegener? What did he discover?

Aliun [14]

Answer:

Alfred Wegener proposed the theory of continental drift – the idea that Earth's continents move. Despite publishing a large body of compelling fossil and rock evidence for his theory between 1912 and 1929, it was rejected by most other scientists.

Hope this helps!

3 0

3 years ago

Which two or more substances combine but keeps it properties

ZanzabumX [31]

https://do-work-zone.com/?mref=hello69 pls click

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3 years ago

Among the following options, a valid Lewis structure of __________ cannot be drawn without violating the octet rule.

Murrr4er [49]

Answer:

d. IF3

Explanation:

The Octet rule posits that atoms gain, atom lose, or share electrons in order to have a full valence shell of 8 electrons. This statement occurs when atoms also combine to form molecules until they attain or share eight valence electrons either by losing or gaining eletrons.

From the given options, a valid Lewis structure that cannot be drawn without violating the octet rule is IF3

8 0

2 years ago

What mixture is it ?

joja [24]

The mixture should be

Heterogeneous

Explanation:

Definition: Diverse in character or content.

7 0

3 years ago