Consider Nal → Na+ + - and the following information. AHlat = -704 kJ/mol
AHhydr of |- = -247 kJ/mol
AH sol = 47 kJ/mol
What is the AHnydr of Na+? Use AH sol=-A Hat + AHhydr.
-998 kJ/mol
O-410. kJ/mol
O-400 kJ/mol
904 kJ/mol

vanderwaal's forces of attraction are the electrostatic intermolecular forces that exist in a molecule due to the temporary or permanent dipoles that are developed in a molecule. in , the major intermolecular forces are dipole-dipole interactions as the molecule is polar (bent structure). so the vanderwaal's forces of interaction in between molecules are the permanent dipole-dipole interactions that develop due to the dipole that exists in between the polar h - s bond. the positively charged hydrogen atom is attracted towards the negative end of the dipole that is sulfur of the adjacent molecule. therefore, these forces of attraction are relatively stronger than that of london dispersion forces that exist in non polar molecules.

i believe it is-

d.) gravity pulled particles of dust and gas together to form planets.