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Dahasolnce [82]
3 years ago
15

What is radioactivity​

Chemistry
2 answers:
Mumz [18]3 years ago
7 0

Answer:

Radioactive decay is the process by which an unstable atomic nucleus loses energy by radiation. A material containing unstable nuclei is considered radioactive. Three of the most common types of decay are alpha decay, beta decay, and gamma decay, all of which involve emitting one or more particles or photons.

Andrei [34K]3 years ago
3 0
The emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei.
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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}

6 0
4 years ago
Who know the answers for both of these or know were to get them from
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8 0
2 years ago
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How many particles are in 5.0 ml of Fe
nordsb [41]

f it is solid iron, use the density to get the mass. D x V = mass  

Use the mass to find the moles of Fe. Mass/atomic mass = moles  

Moles x Avogadro's number will give you the particles, assuming that you mean atoms.

7 0
3 years ago
Which nucleic acid is responsible for controlling the type of cell that is created? a. pla b. dna crna
avanturin [10]
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3 0
3 years ago
Explain the difference between the strength of an acid and the concentration of an acid​
Alinara [238K]

Answer:

Hydrogen Fluoride will dissolve glass & eat concrete; BUT mixed with water, it is very nasty - but fairly weak!

A strong acid EASILY donates a Proton (H+).

Look up dissociation of acids and the ones that give up that H+ is the strong one.

Explanation:

6 0
4 years ago
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