Calcium oxide, or lime, is produced by the thermal decomposition
of limestone in the reaction CaCO3(s)_1 , CaO(s) + CO2(g). What
mass of lime can be produced from 859.6 kg of limestone?

i think it's letter a.

intermolecular forces are the forces between molecules or particles.

there are two kinds of van der waals forces: weak london dispersion forces and stronger dipole-dipole forces.

in molecule of water there are dipole-dipole forces between negatively charged oxygen from one molecule of water and positively charger hydrogen of another molecule of water.

hydrogen bond is an electrostatic attraction between two polar groups that occurs when a hydrogen atom (h), covalently bound to a highly electronegative atom such as flourine (f), oxygen (o) and nitrogen (n) atoms.