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2 years ago

Write a balanced equation from each cell notation:(b) Fe(s) | Fe²⁺(aq) | NO₃⁻(aq) | NO(g) | Pt(s)

Chemistry

1 answer:

tatiyna2 years ago

7 0

The balanced redox reaction is

3Fe + 2NO₃⁻+ 8H+ → 3Fe²⁺ + 2NO + 4H2O

<h3>What is Galvanic cell? </h3>

It is a device that is used for the conversion of the chemical energy which is produce in the redox reaction into the electrical energy. It is also termed as the voltaic cell or electrochemical cell.

In the voltaic cell, at anode which is negative electrode of voltaic cell oxidation occurs and at the cathode which is positive electrode, reduction occurs

<h3>What is redox reaction? </h3>

The reaction in which both reduction and oxidation reaction takes place simultaneously is known as redox reaction.

<h3>What is oxidation reaction? </h3>

The reaction in which a substance or compound or species looses its electrons. In this reaction, oxidation state of an element increases.

<h3>What is reduction reaction? </h3>

The reaction in which a substance or compound or species accept the electrons. In this reaction, oxidation state of an element decreases.

The given two-half reactions are:

At anode:

3Fe → 3Fe²⁺ + 6e-

At cathode:

8H(+) + 2NO₃⁻ → 2NO + 4H2O

Redox reaction:

3Fe + 2NO₃⁻+ 8H+ → 3Fe²⁺ + 2NO + 4H2O

According to the voltaic cell, the half-cell reaction (1) shows oxidation reaction therefore, it occurs at anode and the half-cell reaction (2) shows reduction reaction therefore, it occurs at cathode.

Thus, we concluded that the redox reaction is

3Fe + 2NO₃⁻+ 8H+ → 3Fe²⁺ + 2NO + 4H2O

learn more about voltaic cell:

brainly.com/question/4052514

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svet-max [94.6K]

b.It is a heterogeneous catalyst, so only a small amount is needed and it is easily separated from the products.

Explanation:

Platinum is best described as a heterogeneous catalyst in which only a small amount of it is needed and it can be easily separated from products.

A heterogeneous catalyst is a catalyst that exists in a different phase than the reactants.

A homogeneous catalyst is one that exists in the same phase as the reactants.

A catalyst is a substance that speeds up the rate of chemical reactions.
They help to lower the activation barrier for the reaction and are not used up.
The reactants in the car exhausts are in the gaseous phases.
Platinum is a solid metal.
Therefore we can see that it is a heterogeneous catalyst.

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3 years ago

Use dimensional analysis (KUPS) and your mole map to solve the following problem.

True [87]

IDK JUST NEED ANSWERS,BTW IM DUMB

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3 years ago

What is the activation energy that is large and takes extra energy from the environment?

alisha [4.7K]

I believe that it is enzymes

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3 years ago

Wine goes bad soon after opening because the ethanol in it reacts with oxygen gas from the air to form water and acetic acid , t

Fynjy0 [20]

Answer:

7.00 g

Explanation:

There is some information missing. I think this is the complete question:

<em>Wine goes bad soon after opening because the ethanol CH₃CH₂OH in it reacts with oxygen gas O₂ from the air to form water H₂O and acetic acid CH₃COOH, the main ingredient of vinegar. What mass of ethanol is consumed by the reaction of 4.86g of oxygen gas? Round your answer to 3 significant digits.</em>

<em />

First, we have to write the balanced equation.

CH₃CH₂OH + O₂ ⇒ CH₃COOH + H₂O

Then, we can establish the following relations:

The molar mass of O₂ is 32.0 g/mol
The molar ratio of O₂ to CH₃CH₂OH is 1:1
The molar mass of ethanol is 46.1 g/mol.

The mass of ethanol that reacts with 4.86 g of oxygen is:

$4.86gO_{2}.\frac{1molO_{2}}{32.0gO_{2}} .\frac{1molEt}{1molO_{2}} .\frac{46.1gEt}{1molEt} =7.00gEt$

4 0

3 years ago

A graduated cylinder has 100 mL of water in it. A rock is then placed in the cylinder

gulaghasi [49]

Answer:

105-100=5 ,

${5cm}^{3 }$

8 0

3 years ago