Which of the following statements is not correct? 0.20 mole of o2 = 6.4 g 0.75 mole of h2co3 = 47 g 3.42 moles co = 95.8 g 4.1 moles li2o = 94 g

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

im doing test rn im going with 2 but ill give answer if itss wrong,   : )