A penny having a mass of 2.5559 g was dissolved in 20 mL of 8 M HNO3. The resulting solution was transferred to a 100.00-mL volumetric flask and diluted to the mark with water. This solution was found to have a concentration of 1.06 x 10-2 M Cu2 . What is the % by mass of copper in the penny

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.