Ammonium nitrate (nh4no3) dissolves readily in water even though the dissolution is endothermic by 26.4 kj/mol. the solution process is spontaneous because

In this given scenario, ammonium nitrate dissolves readily in water even though the dissolution is endothermic. The solution process is spontaneous because of the increase of the disorder upon dissolution of this strong electrolyte. In addition, the ions are much more stable in a solution to the extent that ambient heat will be absorbed to complete the process.

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