Choose the molecule or compound that exhibits the strongest intermolecular force.
HBr
HF
Ο Ο Ο Ο Ο
CH4
CO
CH3CH2CH2CH3

the answer for sodium is 0.186

the answer for rubidium is 0.251

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.

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