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Gre4nikov [31]
3 years ago
10

This version of Einstein's equation can be used directly to find what value? `Δm = E/c^2

Chemistry
2 answers:
Oksana_A [137]3 years ago
7 0

Explanation:

In the given version of an Einstein's equation:

\Delta m = \frac{E}{c^2}

\Delta m = Mass defect

E = Nuclear binding energy of an atom which holds the nucleus of an atom together.

c = speed of the light =3\times 10^8 m/s

From the given version one can determine the mass defect which is a binding force of a nucleus in an atom if nuclear binding energy is known.

Marina86 [1]3 years ago
4 0

<u>Answer</u>

mass


<u>Explanation</u>

E=mc² explains nuclear fusion, how matter can be destroyed and converted to energy and energy can be converted back to mass.

It explains the atomic energy produced by nuclear power plants and the atomic energy released by atomic bombs.

E=mc²

m = E/c²

From the version in the question the value to be found directly is mass.

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What is the value of the equilibrium constant at 25 oC for the reaction between the pair: Ag(s) and Ni2+(aq) to give Ni(s) and A
rusak2 [61]

Answer: 3\times 10^{35}

Explanation:

The balanced chemical equation will be:

2Ag(s)+Ni^{2+}(aq)\rightarrow 2Ag^{+}(aq)+Ni(s)

Here Ag undergoes oxidation by loss of electrons, thus act as anode. Nickel undergoes reduction by gain of electrons and thus act as cathode.

E^0=E^0_{cathode}- E^0_{anode}

Where both E^0 are standard reduction potentials.

E^0_{[Ag^{+}/Mg]}=+0.80V

E^0_{[Ni^{2+}/Ni]}=-0.25V

E^0=E^0_{[Ni^{2+}/Ni]}- E^0_{[Ag^{+}/Ag]}

E^0=-0.25-(+0.80V)=-1.05V

The standard emf of a cell is related to Gibbs free energy by following relation:

\Delta G=-nFE^0

\Delta G = gibbs free energy  

n= no of electrons gained or lost  =?

F= faraday's constant

E^0 = standard emf

\Delta G=-2\times 96500\times (-1.05)=202650J

The Gibbs free energy is related to equilibrium constant by following relation:

\Delta G=-2.303RTlog K

R = gas constant = 8.314 J/Kmol

T = temperature in kelvin =25^0C=25+273=298K

K = equilibrium constant

\Delta G=-2.303RTlog K

+202650=-2.303\times 8.314\times 298\times logK

K=3\times 10^{35}

Thus the value of the equilibrium constant at 25^0C is 3\times 10^{35}

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3 years ago
PLEASE ANSWER aisksiwjjskssjjssjsjsjsjsj
Gnesinka [82]

Answer:

The answer will be A

Explanation:

I will send a photo with it

4 0
2 years ago
Group 7A (17) elements can gain one electron to attain a noble gas electron configuration. In combination with metal atoms that
Iteru [2.4K]

Answer:

The two statements are all True for group 7 and 8 elements.

Explanation:

The Group 7 elements are known as the halogens. They are reactive non-metals and are always found in compounds with other elements. Chlorine, bromine and iodine are all halogens.

Chlorine, bromine and iodine are the three common Group 7 elements. Group 7 elements form salts when they react with metals. The term ‘halogen’ means 'salt former'.

In addition to the discription given to norble gases in the question which is true, norble gases;

  •     are inert gases located on the right of the periodic table.
  •     have a full-set of valence electrons, so they're stable, unreactive
  •     are colorless, odorless and tasteless.
  •     have low melting and low boiling points.
  •     can be found in small amounts in the Earth's crust and the Earth's atmosphere.
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3.04 Quiz: Chemical Reactions 1 to 10 question
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Answer:

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2.Substances

3. Properties

4. Precipitate

5. Light

6. Temperature

7. Color

8. Gas

Explanation:

During chemical reactions, new substances that possess new properties are formed. During the process of chemical reactions, evidences are found. Some of the evidences are formation of precipitate or light gel, production of gases and changes in color and temperature.

Chemical reactions start with the substances or compounds which are known as reactants. The reactants react to form new substances known as the products which possess new properties.

I only could help with 1 - 8 sorry.

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A NaOH (aq) stock solution was created by dissolving 3.88 g NaOH in water to create a 100.00 mL solution. What is the concentrat
Ierofanga [76]

Answer:

I have don 3 so far

Explanation:

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