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3 years ago

Which statements are true regarding redox reactions?

Chemistry

1 answer:

Maslowich3 years ago

5 0

Answer : The correct statements are,

(a) A molecule that has gained H atoms is said to be reduced.

(b) Oxidizing agents accept electrons.

(d) If a molecule accepts electrons, it has been reduced.

Explanation :

Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.

Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases.

The loss of electrons is also known as oxidation.

The gain of oxygen is also known as oxidation.

The loss of hydrogen is also known as oxidation.

Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases.

The gain of electrons is also known as reduction.

The loss of oxygen is also known as reduction.

The gain of hydrogen is also known as reduction.

Reducing agent : It is defined as the agent which helps the other substance to reduce and itself gets oxidized. Thus, it will undergo oxidation reaction.

Reducing agents loose electrons.

Oxidizing agent : It is defined as the agent which helps the other substance to oxidize and itself gets reduced. Thus, it will undergo reduction reaction.

Oxidizing agents accept electrons.

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The work done depends upon the --------------applied and the -------------- produced

Deffense [45]

Answer:

The work done depends upon the Force applied and Displacement produced.

Explanation:

Definition: Work is said to be on a body only if a force acting on it causes a displacement in its direction .

In other words we can say it is the product of force and displacement

Formula:

$Work = Force\times Displacement\ cos \theta$

Unit:

The unit of work is Joule.

So, work depends on the force applied and the displacement caused by the applied force.

If force is applied and there is no displacement, then work is 0 .

Example: Pushing a wall does no work.

Work is positive if force applied and displacement is in same direction.

Work is negative if force applied and displacement is in opposite direction.

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3 years ago

What is the name of this compound?

Digiron [165]

2,2-dichloroheptane because we have two Cl we should use the prefix ''di'' and the numbers "2" and "2" indicated that the two functional groups are located on the same second carbon

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3 years ago

URGENTTTTT What is the correct formula when Al+3 combines with CrO4-2

PIT_PIT [208]

A and C are incorrect because they are not complete transfer of valence electrons. Ionic bonds best to form a neutral molecule

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3 years ago

How many moles of hydrogen are in the sample? Round your answer to 4 significant digits.

finlep [7]

Answer:

1.56 mol H₂

Explanation:

Mg₃(Si₂O₅)₂(OH)₂

There are 4 Si moles per Mg₃(Si₂O₅)₂(OH)₂ mol. With that in mind we can calculate how many Mg₃(Si₂O₅)₂(OH)₂ moles are there in the sample, using the given number of silicon moles:

3.120 mol Si * $\frac{1molMg_3(Si_2O_5)_2(OH)_2}{4molSi}$ = 0.78 mol Mg₃(Si₂O₅)₂(OH)₂

Then we can convert Mg₃(Si₂O₅)₂(OH)₂ moles into hydrogen moles, keeping in mind that there are 2 hydrogen moles per Mg₃(Si₂O₅)₂(OH)₂ mol:

0.78 mol Mg₃(Si₂O₅)₂(OH)₂ * 2 = 1.56 mol H₂

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3 years ago

Elements that have atoms with stable valence electron configurations in the ground state are found in

dsp73

Answer:

Group 18, also known as the Noble Gasses

Explanation:

Atoms strive for full stability by gaining or losing electrons to get 8 valence electrons in their valence shell, but Group 18 already has 8 electrons in their valence shell, and are therefore already stable in their ground state.

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3 years ago