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Scorpion4ik [409]
3 years ago
13

HELPPP PLZZ :/

Chemistry
2 answers:
liraira [26]3 years ago
6 0
It’s the second answer
Mandarinka [93]3 years ago
5 0

Answer:

Hey mate....

Explanation:

This is ur answer....

<em>Fossil fuels are made from decomposing plants and animals. These fuels are found in the Earth's crust and contain carbon and hydrogen, which can be burned for energy. Coal, oil, and natural gas are examples of fossil fuels.</em>

<em>(</em><em>Option</em><em> </em><em>2</em><em>)</em>

Hope it helps you,

Mark me brainliest plz....

Follow me! :)

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Answer : HazCom

Explanation : Hazard communication which is also known as HazCom, is a set of processes and procedures that every employers and importers must implement in their workplace to effectively communicate hazards associated with chemicals during handling, shipping, and any form of exposure.

The OSHA Hazard Communication Standard is a U.S. regulation which governs the evaluation and communication of hazards associated with chemicals at the workplace. It is typically not attached to any specific chemical container but is stored in the workplace.

7 0
3 years ago
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Balance each of the following equations according to the half- reaction method:
timofeeve [1]

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. Or we can say that in oxidation, the loss of electrons takes place.

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

<u>(a) The given chemical reaction is :</u>

MnO_4^-+NO_2^-\rightarrow MnO_2+NO_3^-

The oxidation-reduction half reaction will be :

Oxidation : NO_2^-+2OH^-\rightarrow NO_3^-+H_2O+2e^-

Reduction : MnO_4^-+2H_2O+3e^-\rightarrow MnO_2+4OH^-

In order to balance the electrons, we multiply the oxidation reaction by 3 and reduction reaction by 2 then added both equation, we get the balanced redox reaction.

The balanced chemical equation in a basic solution will be,

2MnO_4^-+2H_2O+3NO_2^-\rightarrow 3MnO_2+6OH^-+2NO_3^-

<u>(b) The given chemical reaction is :</u>

MnO_4^{2-}\rightarrow MnO_4^-+MnO_2

The oxidation-reduction half reaction will be :

Oxidation : MnO_4^{2-}\rightarrow MnO_4^-+1e^-

Reduction : MnO_4^{2-}+2H_2O+2e^-\rightarrow MnO_2+4OH^-

In order to balance the electrons, we multiply the oxidation reaction by 2 and then added both equation, we get the balanced redox reaction.

The balanced chemical equation in a basic solution will be,

2MnO_4^{2-}+MnO_4^{2-}+2H_2O\rightarrow 2MnO_4^-+MnO_2+4OH^-

<u>(c) The given chemical reaction is :</u>

Br_2+SO_2\rightarrow Br^-+SO_4^{2-}

The oxidation-reduction half reaction will be :

Oxidation : SO_2+2H_2O\rightarrow SO_4^{2-}+4H^++2e^-

Reduction : Br_2+2e^-\rightarrow 2Br^-

The electrons in oxidation and reduction reaction are same. Now add both the equation, we get the balanced redox reaction.

The balanced chemical equation in a acidic solution will be,

Br_2+SO_2+2H_2O\rightarrow 2Br^-+SO_4^{2-}+4H^+

8 0
3 years ago
A Student records the amount of sunlight that a plant receives each day for one week
ivanzaharov [21]
I think it’s radiation
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2 years ago
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Which is a property of both alkenes and alkynes? Both are highly water soluble. The pH of these hydrocarbons tends to be very ba
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The answer is C i believe let me know if otherwise
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3 years ago
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An element is identified as either a
Kipish [7]

Answer:

Elements can be defined by their unique properties and atomic.

(Hope this helps) Sky

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