Consider the redox reaction below.

Upper Z n (s) plus 2 upper H upper C l (a q) right arrow upper Z n upper C l subscript 2 (a q) plus upper H subscript 2 (g 0).

Which half reaction correctly describes the oxidation that is taking place?
Upper Z n superscript 2 plus (s) plus 2 e superscript minus (a q) right arrow upper Z n (s).
Upper Z n (s) right arrow upper Z n superscript 2 plus (a q) plus 2 e superscript minus.
2 upper H superscript plus, plus 2 e superscript minus right arrow upper H subscript 2.
Upper H subscript 2 plus 2 e superscript minus right arrow 2 upper H superscript plus.

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be

percent abundance for cu-63 can be shown as:

63 x + 65 (1-x) = 62.9296

65 - 62.9296 = 2 x

x = 1.035

thus, percent abundance for cu-63 is 1.035

percent abundance for cu-65 can be shown as:

63 x + 65 (1-x) = 64.9278

65 - 64.9278 = 2 x

x = 0.0361

thus, percent abundance for cu-63 is 0.0361

the mass spectrum of cu-63 showing the intense peak as, this isotope is found in nature more abundantly around 92.38 % in comparison to cu-65 which is found 62.58 % naturally