Analysis shows that nickel oxide has the formula `Ni_(0.98)O_(1.00)`. What fractions of nickel exist as `Ni^(2+)` and `Ni^(3+)` ions?

From analysis it is found that iron oxide has the formula Fe_(0.95)O_(1.00) . What fractions of iron exist as Fe^(2+) & Fe^(3+) ions.

Calculate the emf of the cell in which the following reaction takes place. Ni(s) + 2Ag^+ (0.002 M) rarr Ni^(2+)(0.16M) + 2Ag(s) given that E_(cell)^@ = 1.05V

Calculate the emf of the cell in which the following reaction takes place. Ni_(s) + 2Ag^+ (0.002 M) rarr Ni^(2+)(0.160M) + 2Ag_(s) Given that E_(cell)^@ = 1.05V

Calculate the emf of the cell at 298K, in which the following reaction takes place: Ni(s) + 2Ag^(+)(aq) (0.001M) rarr Ni^(2+)(aq) (0.160M) + 2Ag(s) (Given that E^@ cell = 1.05V )

Mercury has an angle of contact equal to 140^@ with soda lime glass. A narrow tube of radius 1.00 mm made of this glass is dipped in a trough containing mefcury. By what amount does the mercury dip down in the tube relative to the liquid surface outside? Surface tension of mercury at the temperature of the experiment is 0.465 N m^-1 . Density of mercury = 13.6 xx 10^3 kg m^-3

A solution of Ni(NO_3)_2 is electrolysed between platinum electrodes using a current of 5 amperes for 20 minutes. What mass of Ni is deposited at the cathode?

What will be the correct order for the wave lengths of absorption in the visible region for the following. Explain the fact. [Ni(NO_2)_6]^+, [Ni(H_2O)_6]^(2+)