eric w

A certain radioactive nuclide has a half life of 2.00 hours. Calculate decay rate for this nuclide in seconds.

an aqueous solution of pdcl2 is electrolyzed for 27.4 seconds during this time 0.1064 g of Pd is deposited on the cathode. Calculate the average current used in the electrolysis.

Consider the galvanic cell constructed from the following metals and their corresponding metal ions:

E degrees (V)

M^3+^ + 3e^-^ ----> M 0.29

N^2+^ + 2e^-^ ----> N 0.61

calculate the value of K for the cell reaction at 25C

E degrees (V)

A galvanic cell based on the following half reaction s Au3+ 3e- ----> Au 1.50

Mg2+ 2e- ------> Mg -2.37

The cell is set up at 25 C with [Mg2+] = 1.00 x 10^-5 M

The cell potential is observed to be 4.01 V. Calculate the [Au3+] that must be present.

Au3+ = ____________M

The concentration cell shown above employs the reaction Cu2+ +2e- -----> Cu E degree = 0.34 V. Both compartments of the cell have copper metal electrodes. The compartment on the the left contains 8.0 x 10^-3 M Cu2+ and the compartment on the right contains 8.5 x 10^-2M Cu2+. The expected potential for this cell at 25degrees C is ______V

In the hint it says E degrees for this cell is 0V

n = 2

last hint is - if the cell volatage you calculate is negative , what does that mean?

I used the Nernst Equation, but still having trouble on how to solve, help please :)

The equilibrium constant for a certain reaction increases by a factor of 2.84 when the temperature is increased from 300.0 K to 350.0 K. Calculate the standard change in enthalpy for this reaction (assuming H is temperature independent).

for ethanol Δh vap = 38.7 kj/mol at 78 C , its boilng point calculate Δe for the vaporization of 1.00 mol ethanol at 78 C and 1.00 atm pressure

chem 104

to make 1.50 l of 0.100 m nacl from a 3.46 M stock solution, you would to make 43.3 ml of the stock solution and add ____ ml of water