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IRINA_888 [86]
3 years ago
9

An oxygen atom has two electron shells and 6 valence electrons. how many total electrons does this atom have?

Chemistry
1 answer:
Lerok [7]3 years ago
8 0
6 electrons in total
2 on the first shell
4 on the second shell
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A. K₂C₂O₄          Potassium oxalate

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C. Bi₂(C₂O₄)₃         Bismuth (III) oxalate

D. Pb(C₂O₄)₂         Lead (IV) oxalate

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Explanation:

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H₂C₂O₄  + 2KOH  → K₂C₂O₄  +  2H₂O

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This is a precipitate.

C.  2Bi³⁺  +  3C₂O₄⁻²   ⇄  Bi₂(C₂O₄)₃  ↓

This is a precipitate.

D.  Pb⁴⁺ +  2C₂O₄⁻²   ⇄  Pb(C₂O₄)₂  ↓

This is a precipitate.

E. 2NH₄⁺  +  C₂O₄⁻²   ⇄  (NH₄)₂C₂O₄  ↓

This is a precipitate.

F. This is the conjugate strong base, for the weak acid

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HC₂O₄⁻  + H₂O  ⇄  C₂O₄⁻²  +  H₃O⁺    Ka

HC₂O₄⁻  + H₂O  ⇄  H₂C₂O₄  +  OH⁻    Kb

HC₂O₄⁻  is an amphoteric compound

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