How many iron atoms are present in 3.0 mol of iron metal? Group of answer choices 18 .06 x 1023 iron atoms
6.02 x 1023 iron atoms
12.04 x 1024 oxygen atoms
6 potassim atoms

non of the above lol , 3.77 moles of Fe contain 2.27x1024 atoms fe

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