A catalyst lowers the activation energy for both the forward and the reverse reactions in an equilibrium system, so it has no effect on the equilibrium position of a system True
© False???

True

Explanation:

A catalyst lowers the activation energy the same amount of both sides of the reaction.  The rates reactions may be going faster, but they still the same and are canceling each other out after adding or subtracting a catalyst.

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