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belka [17]
4 years ago
9

PLEASE HELP DUE TODAY

Chemistry
1 answer:
11111nata11111 [884]4 years ago
5 0

Formula mass, molar mass and Avagadro's number.

Explanation:

number of atoms in a compound can be calculated by knowing the molar mass of the compound or element, the result will be multiplied by avagadro's number (6.022*10^23)

1 mole of a substance is equal to Avagadro number of atoms.

If the number of moles is known of a compound or element its molar mass can be calculated as:

n= Weight of the compound/element given/ molecular weight of the same.

  formula mass is the mass of compound ie chemical compound formed with different molecules. its mass is calculated by adding the molar masses of all the elements taking part in its assembly.

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Which shell would be complete with 10 electrons?
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Answer:

The answer to your question is letter d

Explanation:

If we remember there is a limit of electrons that can be place in a sublevel

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Sublevel f only accept 14 electrons

This is in agreement wth the levels of energy, that only accept a determine number of electrons

Level               Sublevel               # of electrons

1                             s                                2

2                           s and  p                      8      (2 + 6)

3                           s, p and d                  18      (2+6+10)

4                            s, p, d, f                     32     (2+6+10+14)

5                            s, p, d,f                      32     (2+6+10+14)

6                            s, p, d                        18      (2+6+10)

7                             s, p                            8        (2+6)

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They can both be converted to each other. Hopefully this helps! :)<span />
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