Estimate the theoretical production of landfill gas (CH4 plus CO2 plus NH3) from the degradation of 3.3 kg of slowly decomposable MSW. Assume the density of methane is 0.7167 kg/m^3, that of carbon dioxide is 1.9768 kg/m^3 and that of ammonia is 0.7618 kg/m^3. The production of new bacterial cells can be neglected.

The answer is 4 i don't know if its right let me see.

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.

Good job high