To the top. Common knowledge my dude. Heat always rises to the top.
Answer: 0.94 V
Explanation:
For the given chemical reaction :
Using Nernst equation :
![E_{cell}=E^o_{cell}-\frac{2.303RT}{nF}\log \frac{[Zn^{2+}]}{[Cu^{2+}]}](https://tex.z-dn.net/?f=E_%7Bcell%7D%3DE%5Eo_%7Bcell%7D-%5Cfrac%7B2.303RT%7D%7BnF%7D%5Clog%20%5Cfrac%7B%5BZn%5E%7B2%2B%7D%5D%7D%7B%5BCu%5E%7B2%2B%7D%5D%7D)
where,
F = Faraday constant = 96500 C
R = gas constant = 8.314 J/mol.K
T = room temperature = 
n = number of electrons in oxidation-reduction reaction = 2
= standard electrode potential of the cell = +1.10 V
= emf of the cell = ?
Now put all the given values in the above equation, we get:
The cell potential for this reaction is 0.94 V
Measured values are verified and go under a series of experiments before being accepted as the norm. Accepted values are unanimously accepted values, seen as the norm by a qualified group of individuals (scientists or the people of the intellectual sphere).
Answer : The correct option is, (B) has fewer subatomic particles than an atom of iron (Fe)
.
Explanation :
The given element is chromium (Cr). The atomic number of chromium is 24.
As we know that the atomic number is either equal to the number of protons or number of electrons.
So, Atomic number = Number of protons = Number of electrons = 24
And we know that mass number is the sum of number of protons and number of neutrons.
Mass number of chromium = 52
Mass number = Number of protons + Number of neutrons
52 = 28 + Number of neutrons
Number of neutrons = 28
And we know that the atomic number of iron (Fe) is 26.
Number of protons = Number of electrons = 26
Mass number of Fe = 56
Number of neutrons = 30
From the given options we conclude that the a neutral atom of chromium has fewer subatomic particles than an atom of iron (Fe).
Hence, the correct option is, (B) has fewer subatomic particles than an atom of iron (Fe)
.
