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dangina [55]
3 years ago
9

The electronic configuration of an element is 1s2s22p6. How many valence electrons does it have?

Chemistry
1 answer:
Leto [7]3 years ago
7 0

Answer:

8

Explanation:

Inside this shell

In p orbital there r 6 electrons

And in s orbital thr is 2

Add them

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55.85 grams of Fe is formed.

Explanation:

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0.5 moles of oxide, will need ( 0.5  . 3)/ 2 = 0.751 mol

I have 0.83 moles of C, so C is the excess.

The limiting is the oxide.

3 mol of C need 2 mol of oxide to react

0.83 mol of C, will need (0.83  . 2)/ 3 = 0.553 mol of oxide, and I only have 0.5 (That's why Fe₂O₃ is the limiting)

Ratio is 2:4 (double)

If I have 0.5 moles of oxide, I will produce the double, in the reaction.

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