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sergiy2304 [10]
3 years ago
7

I’m 1992 which city was named the most polluted

Chemistry
2 answers:
Arada [10]3 years ago
7 0

Answer:

Mexico City as the most polluted city in the world in 1992

Explanation:

Elden [556K]3 years ago
6 0

Answer:

Mexico City

Explanation:

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What is the oxidation half-reaction for this unbalanced redox equation? cr2o72– + fe2+ → cr3+ + fe3+ cr3+ → cr2o72– cr2o72– → cr
KatRina [158]

Answer:

6Fe^2+(aq) -------> 6Fe^3+(aq) + 6e

Explanation:

The balanced oxidation half equation is;

6Fe^2+(aq) -------> 6Fe^3+(aq) + 6e

A redox reaction is actually an acronym for oxidation-reducation reaction. Since the both reactions are complementary, there can't be oxidation without reduction and there can't be reduction without oxidation.

The main characteristic of redox reactions is that electrons are transferred in the process. The number of electrons transferred is usually deduced from the balanced reaction equation. For this reaction, the balanced overall reaction equation is;

Cr2O7^2–(aq) + 6Fe^2+(aq) +14H^+(aq)→ 2Cr^3+(aq) + 6Fe^3+ (aq) + 7H2O(l)

It is clear from the equation above that six electrons were transferred. Thus six Fe^2+ ions lost one electron each in the oxidation half equation as shown in the balanced oxidation half equation above.

4 0
3 years ago
What is the balanced form of the chemical equation shown below?
Svetradugi [14.3K]

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D

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Double Displacement reaction

Both sides are balanced with option D

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3 years ago
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here's how to remember:

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