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EleoNora [17]
3 years ago
12

20 POINTS! How many valence electrons does Iron (Fe) have? How do you know? - I believe it is 2 valence electrons, but I am not

sure what proves that.
Chemistry
2 answers:
AfilCa [17]3 years ago
8 0

Answer:

Iron, or Fe, has 26 electrons, with two electrons in the outer valence shell. Iron is a transition metal and is both lustrous and easy to work with. Iron is also prone to rust, especially in damp environments. Iron is a ferrous metal, meaning that it can be magnetized.

Explanation:

NISA [10]3 years ago
7 0

Answer:

Iron has a valency of 2+

Explanation:

The atomic number for Fe is 26, so that makes the electron configuration 2.8.8.8.2 so if you take the no. of electron it will be 2, so it will have to loose the two electrons in order to fill it's outermost electrons.

So it will develop a valency - 2+

Remember as you loose an electron the valency will be a positive but if you gain an electron the charge will be a negative

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If 90.0 grams of ethane reacted with excess chlorine,how many grams of dicarbon hexachloride would form
tigry1 [53]

Answer:

709 g  

Step-by-step explanation:

a) Balanced equation

Normally, we would need a balanced chemical equation.

However, we can get by with a partial equation, as log as carbon atoms are balanced.

We know we will need an equation with masses and molar masses, so let’s <em>gather all the information</em> in one place.  

M_r:    30.07          236.74

           C₂H₆ + … ⟶ C₂Cl₆ + …  

m/g:    90.0

(i) Calculate the moles of C₂H₆

n = 90.0 g C₂H₆  × (1 mol C₂H₆ /30.07 g C₂H₆)

  = 2.993 mol C₂H₆

(ii) Calculate the moles of C₂Cl₆

The molar ratio is (1 mol C₂Cl₆/1 mol C₂H₆)

n = 2.993 mol C₂H₆ × (1 mol C₂Cl₆/1 mol C₂H₆)

  = 2.993 mol C₂Cl₆

(iii) Calculate the mass of C₂Cl₆

m = 2.993 mol C₂Cl₆ × (236.74 g C₂Cl₆/1 mol C₂Cl₆)

m = 709 g C₂Cl₆

The reaction produces 709 g C₂Cl₆.

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8 0
3 years ago
Question 3 (5 points)
Daniel [21]

Answer:

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Explanation:

I'm having some issues with the work however, your final answer should be 332.918g O2

Hope this helped!

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2 years ago
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