What are the proper techniques for using cuvettes (choose all that apply). Group of answer choices The cuvettes should be filled only 1/2 way with solution The cuvettes should not be labelled in any way The cuvettes should be washed with DI water only The cuvettes should be cleaned before you transfer your solutions You must label the cuvettes 1-5 with a sharpie so you don't mix up your samples when going to the computer room

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