Analyze and solve this partially completed galvanic cell puzzle. There are 4 electrodes each identified by a letter of the alphabet, A through D. The values in the partially completed grid are measured cell potentials for a cell consisting of electrode #1 and electrode #2. You may assume that each galvanic cell was properly constructed with the appropriate metals and solutions and that all the measured values in the grid are accurate.

electrode #1 ?

C

B

D

A

electrode #2?

Ecell(volts)

Ecell(volts)

Ecell(volts)

Ecell(volts)

C

0

0.91

0.62

0.26

B

0.91

0

1.53

D

0.62

1.53

0

0.36

0 volts

0.10 volts

0.26 volts

0.36 volts

0.55 volts

0.62 volts

0.65 volts

0.88 volts

0.98 volts

1.17 volts

1.27 volts

1.79 volts

1.89 volts

Complete Question

The complete question is shown on the first uploaded image

The correct option is  

Explanation:

  From the question we are told that

          the cell voltage for AD is  

From the data give we can see that

i.e          

   In the same way we can say that

=>        

- calcium has greater affinity to bond with electron receptors than hydrogen does and hence, it has the ability to replace hydrogen in most of its compounds.

- lithium has 2 valence electrons in the product because it can make only 1 bond with hydrogen. beryllium has 4 valence electrons in the product because it can only make 2 bonds. it has fewer electrons than neon and can react with electron donors. each hydrogen has 2 valence electrons, the same as helium.

- the covalent bond formed between carbon and hydrogen is polar because carbon is more electronegative than hydrogen and it attracts the bonded electron pair closer to itself, thus giving hydrogen a partial positive charge.

- a hydrogen bond is a relatively weak bond that hydrogen atoms make with the electronegative atoms nitrogen, oxygen or fluorine.

so the best choice is a.) 2 calcium (ca) atoms