Atank contains 400 liters of frest brine containing 0.3 kg/liter of salt runs into th tank at the rate of 5 liters/minute. the mixture uniform by stirring, runs out at 10 liters/minuta find the maximum amount of salt in the tank and the t. required to reach the maximum.

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.