Answer: The mole ratio of 
to 
is 1: 1
Explanation:
According to the balanced chemical equation ,the number of atoms of each element has to be same on reactant and product side. The stoichiometric coefficients of the species represent their number of moles.
Thus in the reactants, there is 1 mole of and 1 mole of 
molecule. And thus there is 1 mole of in the product as well.
Thus the mole ratio of to is 1: 1
First, we write the half equations for the reduction of the chemical species present:
Cu⁺² + 2e → Cu; E° = 0.34 V
Ni⁺² + 2e → Ni; E° = - 0.23 V
In order to determine the potential of the cell, we find the difference between the two values. For this:
E(cell) = 0.34 - (-0.23)
E(cell) = 0.57 V
The second option is correct. (The difference in values is due to different values in literature, and it is negligible)
Biotic are living organisms and abiotic are non living things such as rocks water soil
Mass of reactants > mass of products
a.True.
The ordely geometric arrangement of atmos is called a crystalline solid.
