13.
avogadro's constant has the same value as the number of
a.
molecules in 1 mol of solid iodine
atoms in 1 mol of chlorine gas.
c.
ions in 1 mol of solid potassium bromide (kbr).
d.
protons in 1 mol of helium gas.

3 hours because it is a decent distance.

answerto predict;

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