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Sveta_85 [38]
3 years ago
6

What conditions must occur before nuclear fusion begins during star formation?

Chemistry
1 answer:
allsm [11]3 years ago
7 0
Conditions such as high pressure and high temperature must occur.
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3.
Alecsey [184]

Answer:

<h3>no it is not allowed</h3>

Explanation:

<h3>Liwis structure shows the elements symbol with dots thet represents valance electrons ; in second row elements their atomic number is 3 up to 10 , from Li up to Ne from their electron configuration their valance electron will be from 1 up to 8 respectivelly ,if lewis structure represents the element with it is symbol and dots that represents valance electron the second row elements cannot have more than an octet of valance electrons surrounding it.</h3>

<h3>I think it is help ful for you </h3>
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La agencia de protección al ambiente de Estados Unidos para
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I don’t know I don’t know I don’t know
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2 years ago
You are planning an investigation that explores properties of matter.
Elena-2011 [213]

Answer:

Placing a powder into a beaker that contains liquid, resulting the beaker to get hotter.

Explanation:

Physical property is something that you can observe that does not affect the mixture/solution/substance, and that includes temperature

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2 years ago
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I’m pretty sure it’s Nose
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3 years ago
Read 2 more answers
Which of the following solvent pairs could be used in a solvent pair recrystallization (in general, not for this specific reacti
lilavasa [31]

Answer:

(a) Ethyl acetate and hexane, and (c) methanol and methylene chloride.

Explanation:

re-crystallization is a technique used to purify solid compound.   Ethyl acetate and hexane are good solvent pair for recrystallization because they are miscible with each other due to their good differences in polarity. ethyl acetate has polarity of 77 while hexane has 68.

water and diethyl ether are not good solvent pair for recrystallization because water and diethyl ether are immiscible. They have very far polarity values. water has 100 while diethyl ether has 35

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