Hypothesis: Explain the relationship between forward and reverse reactions at equilibrium and projectile changing the amount of a reactant or product (creating stress) will affect that relationship.
For example (select one from each underlined section)
1: If the amount of (Reactant or Product) increases, the rate of the (Forward or Reverse) reaction will (Increase or Decrease) to reach equilibrium.
2: If the amount of (Reactant or Product) decreases, the rate of the (Forward or Reverse) reaction will (Increase or Decrease) to reach a new equilibrium.

b. is the answer hoped i        

it's c (engineer's do their work with mechanical stuff not on any living being)

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