Moles of electrons:
The moles of electrons that are transferred are 12F
A balanced equation:
2 moles of Aluminium metal react with excess copper(II) nitrate.

Given:
Moles of Aluminium = 2
As Aluminium goes from 0 to +3 oxidation state

And copper goes from +2 to 0

On balancing the number of electrons we get:
For 1 mole of Al
is required.
Therefore for 2 moles of Al,
Total
F mole of electrons
Where F= Faraday's constant= 96500 C
So, 12F moles of electrons are transferred.
Learn more about Faraday's Law here,
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Answer:
Several of the nonmetals are gases in their elemental form. Elemental hydrogen (H, element 1), nitrogen (N, element 7), oxygen (O, element 8), fluorine (F, element 9), and chlorine (Cl, element 17) are all gases at room temperature, and are found as diatomic molecules (H2, N2, O2, F2, Cl2).
Explanation:
Answer:

Explanation:
Using the expression for the photoelectric effect as:

Also, 

Applying the equation as:

Where,
h is Plank's constant having value 
c is the speed of light having value 
is the wavelength of the light being bombarded
Given, 
is the binding energy or threshold energy
is the kinetic energy of the electron emitted. = 
Thus, applying values as:





Answer:
D I think the answer is D for this question