The maximum partial pressure of oxygen (PO2) we use in Nitrox diving is: Is dictated by law in many countries. Can be determined by multiplying depth in atmospheres by Bernoulli's Constant. Should never exceed the equivalent of breathing 100 percent oxygen at the surface. None of the above.

Answer-ide.

Answer//the law of conservation of mass.;

Vander waals forces are inter molecular bonds that exist within molecules of the same substance. a water molecule is made up of oxygen and hydrogen atoms which share electrons between each other. the vander waals forces are forces that exist between multitude of different  molecules of water. dipole dipole forces is the type of vander waals force that exist in water. the oxygen atom which is more electronegative pulls the shared electron closer to itself thus generating a partial negative charge while the hydrogen acquire a partial positive charge. these two different charges causes attraction to occur in water molecules.

Elements would be the right answer