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vichka [17]
3 years ago
12

Which of the following changes requires an oxidizing agent?

Chemistry
2 answers:
KatRina [158]3 years ago
8 0
2F⁻ → F₂ + 2e⁻

(mainly electrochemical oxidation)
Ad libitum [116K]3 years ago
4 0

Answer : The correct option is, 2F^-\rightarrow F_2+2e^-

Explanation :

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In the oxidation reaction, the oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.

Oxidizing agent : It is defined as the substance which has ability to oxidize the other substances by gaining electrons.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In the reduction reaction, the oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.

Reducing agent : It is defined as the substance which has ability to reduce the other substances by losing electrons.

From the given options, we conclude that

(1) O_2+4e^-\rightarrow 2O^{2-}

(2) SO_3+H_2O\rightarrow SO_4^{2-}+2H^+

(3) MnO_2+4H^++2e^-\rightarrow Mn^{2+}+2H_2O

The reaction 1, 2 and 3 shows the reduction reaction. So, it requires a reducing agent.

(4) 2F^-\rightarrow F_2+2e^-

The reaction 4 shows the oxidation reaction. Therefore, it requires an oxidizing agent.

Therefore, the correct option is, 2F^-\rightarrow F_2+2e^-

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Reaction A and B are unfavorable.

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If you have a gold chain that weighs 80.7 grams, what is the volume of the chain?​
just olya [345]

The volume of the gold chain is 4.18 cm³

<h3>What is density? </h3>

The density of a substance is simply defined as the mass of the subtance per unit volume of the substance. Mathematically, it can be expressed as

Density = mass / volume

With the above formula, we can determine the volume of the chain. Details below:

<h3>How to determine the volume of the gold chain</h3>

The following data were obtained from the question:

  • Mass of gold = 80.7 g
  • Density of gold = 19.3 g/cm³
  • Volume of gold chain =?

Density = mass /volume

Cross multiply

Density × volume = mass

Divide both sides by density

Volume = mass / density

Volume of gold chain = 80.7 / 19.3

Volume of gold chain = 4.18 cm³

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