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WARRIOR [948]
3 years ago
12

Which one is right for brainliest

Chemistry
2 answers:
Radda [10]3 years ago
8 0

Answer:

Its the first and second options

Explanation:

You can simplify the 7b(3+c) to 21b+7bc or you can also make the problem be (7b*3)+(7b*c)

SVEN [57.7K]3 years ago
6 0
I believe it is the second option
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What factor can limit the buffering capacity of a molecule?
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Answer:

The concentration and pKa of an acid and its conjugate base can limit the buffering capacity of a molecule.

Explanation:

A buffer is an acid and its conjugate base and the quality of it depends on its buffer capacity. This buffer capacity is the resistance to change the pH of the solution when strong acids or bases are added. The buffer capacity is related to the buffer concentration, the concentration of the acid end its conjugate base. Also, every acid has a pKa and the buffer capacity is at its maximum at the pKa value and can buffer the solution between ± 1 the pKa value.

8 0
3 years ago
What does the author predict about the future of the Earth's mantle? Do you support his educated guess? Use complete sentences t
Masja [62]

The earth's mantle will not change in the future because this region is safe from the intervention of human beings.

<h3>What happens in the Earth's mantle?</h3>

The transfer of heat and material in the mantle helps us to determine the landscape of Earth. Activity in the mantle moves the plate tectonics, that contributes to volcanoes, seafloor spreading, earthquakes, and building of mountains.

So we can conclude that the earth's mantle will not change in the future because this region is safe from the intervention of human beings.

Learn more about mantle here: brainly.com/question/349072

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7 0
2 years ago
Explain that : how we explore different between Licl and Nacl
Leona [35]

Answer:

See the explanation below, please.

Explanation:

In the bunsen burner, the gas and air inlet can be regulated manually. In the case of metals (such as lithium and sodium in this case) they contain an electron in the latter in its external electronic configuration. They are characterized by transferring electrons easily and produce the emission of light when excited, producing flames of different colors in the lighter (orange for sodium and red / scarlet for lithium)

8 0
3 years ago
How many of the electrons in a molecule of ethane are not involved in bondind​
vovikov84 [41]

Ethane consists of 6C−H bonds and 1C−C bond. Total number of bonds is 7. Each bond is made up of two electrons

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7 0
3 years ago
Suppose that a certain atom possesses only four distinct energy levels. Assuming that all transitions between levels are possibl
olya-2409 [2.1K]

Answer:

Following are the response to the given question:

Explanation:

The number of shells

n = 4

Calculating the spectral line:

= \frac{n(n-1)}{2}\\\\ = \frac{4(4-1)}{2} \\\\= \frac{4\times 3}{2}\\\\ = \frac{12}{2}\\\\ = 6

4 0
3 years ago
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