1) The density of water is 1.0 g/cm and the density of ethanol is 0.79 g/cm. The particles of water have a smaller mass than the particles of ethanol. What does this information tell us about the number of particles in each cm of water compared to ethanol? 2) Is the higher density of water with smaller mass particles compared to ethanol consistent with our discussion of how hard the water and ethanol particles are pulling on each other? 3) If the water particles are essentially equal in size to the ethanol particles how does the space between the particles compare for the two liquids? Explain. 4) Suppose there are two materials that are made of particles that have the same mass, but different volumes. If the densities of these two materials when they are liquids differ, how would you explain the difference in terms of the arrangement of the particles and how hard the particles pull on each other?