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Goshia [24]
3 years ago
7

Which of the following has three electrons in its valence shell?

Chemistry
2 answers:
lianna [129]3 years ago
7 0

valence electrons are the number of electrons in the outermost shell.

electron configuration is where the electrons are arranged in ascending order of energy shells

the electron configurations for the elements given are as follows

C - 2,4

Al - 2,8,3

Na - 2,8,1

Ca - 2,8,8,2

from the given elements, Aluminium has 3 electrons in its outermost shell.

answer is Aluminium

Lady_Fox [76]3 years ago
3 0
Aluminum because its in family three
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\frac{8400m}{35m} =240minutes

Now convert into hours. (Remember that 1h has 60min)

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3 years ago
What is the molecular formula of a compound given the molar mass of the compound is 62.18 g/mol and the empirical formula is c2h
Mariulka [41]
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5 0
3 years ago
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6 0
3 years ago
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pantera1 [17]

Answer:

1. Options A and B

2. Options B and C

3.. B. Net ∆G = -16.7 KJ/mol; C. Net ∆G = -14.2 KJ/mol

Explanation:

1. The spontaneity of a chemical reaction depends on its standard free energy change, ∆G. If ∆G is negative, the reaction is favourable, but when it is positive, the reaction is unfavorable.

Therefore, since reaction A and B have ∆G to be positive, they are unfavorable

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Coupling reaction A and C, as well as reaction B and C will make the reactions to become favourable as net ∆G is negative in both instances.

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4 0
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