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2 years ago

How many neutrons are in an atom with the atomic number of 15 and an atomic mass number of 34? А. A ? 19 B В ? 2 15 C. ? 34

Chemistry

1 answer:

kondaur [170]2 years ago

6 0

To find the amount of neutrons you just do
N = M - n (mass - number)
34 - 15 = 19
So your answer is 19
Hope it helped

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The cell potential of a redox reaction occurring in an electrochemical cell under any set of temperature and concentration condi

avanturin [10]

Answer : The actual cell potential of the cell is 0.47 V

Explanation:

Reaction quotient (Q) : It is defined as the measurement of the relative amounts of products and reactants present during a reaction at a particular time.

The given redox reaction is :

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

The balanced two-half reactions will be,

Oxidation half reaction : $Zn\rightarrow Zn^{2+}+2e^-$

Reduction half reaction : $Ni^{2+}+2e^-\rightarrow Ni$

The expression for reaction quotient will be :

$Q=\frac{[Zn^{2+}]}{[Ni^{2+}]}$

In this expression, only gaseous or aqueous states are includes and pure liquid or solid states are omitted.

Now put all the given values in this expression, we get

$Q=\frac{(0.0141)}{(0.00104)}=13.6$

The value of the reaction quotient, Q, for the cell is, 13.6

Now we have to calculate the actual cell potential of the cell.

Using Nernst equation :

$E_{cell}=E^o_{cell}-\frac{RT}{nF}\ln Q$

where,

F = Faraday constant = 96500 C

R = gas constant = 8.314 J/mol.K

T = room temperature = 316 K

n = number of electrons in oxidation-reduction reaction = 2 mole

$E^o_{cell}$ = standard electrode potential of the cell = 0.51 V

$E_{cell}$ = actual cell potential of the cell = ?

Q = reaction quotient = 13.6

Now put all the given values in the above equation, we get:

$E_{cell}=0.51-\frac{(8.314)\times (316)}{2\times 96500}\ln (13.6)$

$E_{cell}=0.47V$

Therefore, the actual cell potential of the cell is 0.47 V

4 0

3 years ago

In June there are fewer hours of daylight and less direct sunlight in the

Dafna11 [192]

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3 years ago

the temperature is increased, the position of equilibrium moves to the left, and the yield of ammonia decreases.

igomit [66]

Answer:i don't rlly get the question but this is what i found on the internet :/

Explanation:

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2 years ago

3. How many atoms of hydrogen do 3.575 mol of hydrogen sulfide contain?

Ksju [112]

Answer:

4.3043x10^24

Explanation:

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3 years ago

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ICE Princess25 [194]

Yo!
Im not sure 'bout your answer but 60 percent the answer can be,
The body could take in too much dietary fiber, which harms the cell.

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4 years ago

How many neutrons are in an atom with the atomic number of 15 and an atomic mass number of 34? А. A ? 19 B В ? 2 15 C. ? 34​

How many neutrons are in an atom with the atomic number of 15 and an atomic mass number of 34? А. A ? 19 B В ? 2 15 C. ? 34