The predominant intermolecular force in (ch3)2nh is the predominant intermolecular force in (ch3)2nh is london dispersion forces ion-dipole forces hydrogen bonding ionic bonding dipole-dipole forces

The predominant intermolecular force in (CH3)2NH is hydrogen bonding.
Hydrogen bond is an electrostatic attraction between two polar groups in which one group has hydrogen atom (H) and another group has highly electronegative atom such as nitrogen (like in this molecule), oxygen (O) or fluorine (F).

Matter- occupies space and possesses rest massno matter is the opposite

Answer; carbon monoxide (co);