Lower density does not necessarily mean a material is lighter; rather, it depends on both density and volume. An object with a larger molar mass is not always larger in size. For example, comparing a penny with a density of 9 g/cm^3 to a tank truck full of water with a density of 1 g/cm^3 illustrates that the penny is heavier due to its higher density, assuming equal volumes. The relationship between mass, density, and volume is crucial: mass equals density multiplied by volume. Therefore, when comparing two different chemicals of the same volume, the one with the higher density will indeed be heavier. Additionally, mass and weight are directly proportional; thus, in the same gravitational field, the object with greater mass will have greater weight.
