Based on the diagram, which statement explains how energy is conserved during this chemical reaction?
B
Potential energy
of a system
cl
Reaction progress
O A. The potential energy gained by the reaction system (A) is lost
from the surroundings.
O B. The potential energy lost during the formation of products (Bilis
lost by the surroundings.

can you attach the

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