Because rusting is a spontaneous process under standard conditions, which of the following is a correct conclusion about the process? A)`DeltaG` is positive and `DeltaH` is greater than the product of temperature and `DeltaS` .
B)`DeltaG` is positive and the product of temperature and `DeltaS` is greater than `DeltaH` .
C)`DeltaG` is negative and the product of temperature and `DeltaS` is greater than `DeltaH`.
D)`DeltaG` is negative and `DeltaH` is greater than the product of temperature and `DeltaS`.

the answer is c.the valence of the atoms combine .

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

hypostyle hall;