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balandron [24]
3 years ago
6

Which excerpt from "Black Hole Beginnings' would this

Chemistry
2 answers:
just olya [345]3 years ago
8 0

Answer: idk the answer but it’s b

Explanation:

Ainat [17]3 years ago
4 0

Answer:

before a star is a star, it is an enormous cloud of gasses.

Explanation:

If you read the article, you would find in one of the paragraphs that it talks about stars and how they are balls of gasses before they are stars.

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Need help!
inysia [295]

Answer:

When an apple is cut or bruised the oxygen goes into the injured plant tissue. It begins to oxidize from the reaction of the enzymes and oxygen. The apple produces melanin to protect it causing it to brown. Using vinegar and lemon juice help stop the browning because lemon juice has a compound that reacts with oxygen before the oxygen can react with apple. Also, vinegar and lemons are very acidic which slows the browning reaction.

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5 0
3 years ago
What is the energy of a wave having a frequency of 9.83 x 1013 Hz?
Leno4ka [110]

Answer:

9.95779 Hz

Explanation:

5 0
3 years ago
Calculate the approximate enthalpy change, ΔHrxn, for the combustion of methane:
Alekssandra [29.7K]
<span>The heat of combustion is obtained by getting the difference between the summation of enthalpies of the products and the enthalpies of the reactants. Hence the equation is enthalpy change= 1598 kJ+2*928 kJ-1656 kJ-498 kJ. The answer is 1300 kJ.</span>
5 0
4 years ago
Read 2 more answers
. De las siguientes soluciones:
Ivahew [28]

Answer:

can u translate this to English? I might be able to help

6 0
3 years ago
Given that plist has been defined to be a list of 30 elements, add 5 to its last element.
Kryger [21]
Hi. Your question is quite ambiguous. If the list here follows the periodic table, then I think you are asking for elements 31 to 35. Element 30 is Zinc. This is followed by Gallium (Ga), Germanium (Ge), Arsenic (As), Selenium (Se) and Bromine (Br).
6 0
3 years ago
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