Calculate the cell potential for the reaction as written at 25.00 C given that [Cr2+ ]=0.862 M and [Fe2+ ]=0.0140M Use the standard reduction potentials in this table.

0.497 V

Explanation:

We need to apply the Nernst equation here. According to the Nernst equation;

Ecell= E°cell - 0.0592/n log Q

Where;

Ecell= emf of the cell under the given conditions

E°cell= standard emf of the cell

n= number of electrons transferred

Q= reaction quotient= [products]/[Reactants]= [Cr^2+]/[Fe^2+]

Balanced redox reaction equation; Cr(s)+Fe2+(aq)>Cr2+(aq)+Fe(s)

Values of standard electrode potential

Fe II: -0.44 V

Cr II: -0.91 V

E°cell= (-0.44) - (-0.99)

E°cell= 0.55V

[Fe2+ ]=0.0140M

[Cr2+ ]=0.862 M

Number of electrons transferred (n)= 2

Substituting into the Nernst's equation;

Ecell= 0.55- 0.0592/2 log [0.862]/[0.0140]

Ecell= 0.55 - 0.053

Ecell= 0.497 V

each  column  of the  table  is called a group. elements in a group share similar properties. groups are  read  from  top  to  bottom. metal. metalloid. nonmetal. solid. liquid. gas. fe. hg. o.  2. 3. 4. 5. 6. 7. 8. 9.  2. beryllium. 9.012. 4.  sodium. 22.990.  11. 3.  magnesium. 24.305.  12.  potassium. 39.098.  19. 4.  calcium. 40.078.  20. i guess  i  

the best answer is d because the strong cohesion is caused by the ability of water molecules to undergo hydrogen bonding.

a is incorrect because when water solidifies, it becomes   ice, which expands and occupies a bigger volume for the same mass of water in its liquid state.

b is incorrect because water has high surface tension. besides bonding to itself it hydrogen bonds to other molecules at the top decreasing possibility for breaking of attractive forces.

c is incorrect because the water molecule has oxygen which is highly electronegative and so pulls the electron pair towards itself creating a dipole moment, making the molecule polar.

e is incorrect because water has strong adhesion, ability to stick to other molecules such as glass because of this molecules having stronger hydrogen bonding than water.