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Anastaziya [24]
3 years ago
7

Solid carbon (C) can burn in oxygen (O2). Select

Chemistry
1 answer:
Vitek1552 [10]3 years ago
8 0

Answer:

  • CO₂

Explanation:

The equation that you have to complete is:

  • C + O₂ → ?

This is, you have to find the products formed and the coefficients in front of each substance to balance the chemical equation.

Carbon may react with oxygen using oxidation number 2 or 4.

If carbon uses oxidation number 2, the chemical equation is:

  • 2C + O₂ → 2CO

If carbon uses oxidation number 4, the chemical equation is:

  • C + O₂ → CO₂

Normally, an incomplete combustion yields to a mixture of products: both CO and CO₂, and it only happens when the amount of oxygen is limitied.

When there is plenty of oxygen available, the combustion is complete and the only product of the reaction is CO₂.

With that information, and the fact that the list of choices do not include CO as product, you conclude that this is a complete combustion, and the chemical equation is:

  • C + O₂ → CO₂

So, the choice that completes the chemical equation is CO₂.

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If the H+ concentration is 0.00001 M, what is the OH- concentration?
Ne4ueva [31]

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1.00x10^-9

Explanation:

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What is the difference between a purine and a pyrimidine?
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Answer: Adenine and guanine are the two purines and cytosine, thymine and uracil are the three pyrimidines. The main difference between purines and pyrimidines is that purines contain a sixmembered nitrogencontaining ring fused to an imidazole ring whereas pyrimidines contain only a sixmembered nitrogencontaining ring. They both are types or categories of nitrogen containing bases present in nuclei acids of DNA and RNA.

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Which compound is an isomer of propanoic acid (CH3CH2COOH)?
arlik [135]

Answer:

D) HCOOCH2CH3

Explanation:

An isomer of a compound is defined as a chemical substances with the same formula (That is, same atoms) but in different structures.

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A) CH2CHCOOH . Here you have 3 atoms of C but 4 atoms of H. That means this compound is not an isomer.

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5 0
2 years ago
Read 2 more answers
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