Brainliesttt !me : )

which statement is true for dipole-dipole forces?

they are stronger than hydrogen bonding forces.
they are weaker than london dispersion forces.
they occur between ions and polar molecules.
they occur between polar molecules.

They occur between polar molecules.

Explanation:

So, the right choice is: They occur between polar molecules.

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