Crown ethers solubilize ionic compounds by creating a hydrophilic binding pocket that fits a metal cation with a hydrophobic outside. Say you wanted to dissolve each of the following ionic compounds in benzene - you'd have to add the appropriate crown ether. Match each compound with the appropriate crown ether. LICI
NaF
Br
CKF
A. 12-crown-4
B. 18-crown-6
C.21-crown-7
D. 9-crown-3
E. 15-crown-5
F. 6-crown-2

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