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Phantasy [73]
3 years ago
6

Pls help tysm <3 :D:D

Chemistry
1 answer:
Marianna [84]3 years ago
5 0
Not sure about 2 or 3 but I believe that for number 1 is B or claim 2!!
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Enthalpies of reaction calculated from bond energies and from enthalpies of formation are often, but not always, close to each o
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The enthalpy change in a reaction is given by-

ΔH°rxn = ∑nΔH°f,products - ∑nΔH°f,reactants

This can be expressed in terms of bond energy as-

ΔH°rxn = BEreactants - BEproducts

Therefore, the calculated bond energy according to the above equation will be-

ΔH°rxn = [ (C-C) + 2(C-O) + 4(C-H) + 2(O-H) ] - [ (C-C) + 2(C-O) + 4(C-H) + 2(O-H)  = 0 kJ/mol

<h3>What is enthalpy change?</h3>

Enthalpy change is a measure of the energy emitted or consumed in a reaction. This can be determined using the following equation which involves standard enthalpy of reactant and product formation:

ΔH°rxn = ∑nΔH°f,products - ∑nΔH°f,reactants

<h3>What is bond energy?</h3>

Bond energy is defined as the amount of energy needed to dissociate a mole of molecules into their individual atoms.

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2 years ago
The nuclear fission process releases neutrons and
yuradex [85]
<span>the answer is c. energy</span>
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3 years ago
Determine the charge on the unknown ion, X, in the compound Nax.
Leviafan [203]

Answer:

wax i think

Explanation:

i don't understand a thing you just wrote

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Describe the flow of blood to the human body, including through each of the four chambers of the heart. Explain how the blood ch
xeze [42]
Hey there,

The blood needs to flow at a great and constant speed. It can not flow very slow because that can be warning's of a heart attack because your blood is using alot of force and its trying to provide as much blood as possible to arrive at the heart in order for your body to live. This is why we should drink water because as we drink water, it helps our blood flow through out our body well and so that we ma not have any problem now and in the future.

~Jurgen 
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3 years ago
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What biological molecules transport other substances, provide structural
PSYCHO15rus [73]

The biological molecules that transport other substances are the proteins.

<h3>What are proteins?</h3>

Proteins are biological macromolecules that contains nitrogen in their molecules and are the building block of a living organism.

The proteins perform the following functions:

  • they transport other substances,

  • provide structural support,

  • cause the movement of muscles, and

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