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Alina [70]
4 years ago
8

Which is a diatomic molecule? A. He B. O2 C. NaCl D. CuF2

Chemistry
2 answers:
Alex4 years ago
6 0

Answer:

O2

Explanation:

katrin2010 [14]4 years ago
4 0

O2 is the right answer                      

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Which of the following is a primary cause of LO/TO accidents?
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<h2>Answer:</h2>

The correct answer is

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Give the half equation to show what happens to oxygen when it is rusting
ycow [4]

Answer:

½O 2 + 2e - + H 2O → 2OH.

Explanation:

Redox reactions - Higher

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reduction is gain of electrons

Rusting is a complex process. The example below show why both water and oxygen are needed for rusting to occur. They are interesting examples of oxidation, reduction and the use of half equations:

iron loses electrons and is oxidised to iron(II) ions: Fe → Fe2+ + 2e-

oxygen gains electrons in the presence of water and is reduced: ½O2 + 2e- + H2O → 2OH-

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Can a combination reaction be a redox reaction ?
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Answer:

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Two elements are mixed in a combination reaction to produce a single product.

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Example: water formula

2H2 + O2 → 2H2O

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2H2 + O2 → 2H2O

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