What is an IB education? The IB programme continuum of international education This document is provisional pending review of the IB learner profile. Additional resources to support and communicate What is an IB Education? will be available in 2013â14.
Hello Ariana! Molecular weight and diffusion are inversely proportional; the greater the molecular weight, the slower the rate of diffusion. In fact, certain molecules can never pass through membranes, thus protecting the cell. I am not sure I understand your theory and second question.
On a molecular level the density difference between the two is a result of lead having heavy, closely packed molecules while water's tend to be light and more loosely packed. Density is actually a measure of the mass or weight of the molecules in matter and their spacing.The biggest difference between lead and water is their molecular weights. But if you were to compare a liquid's density with a gas, it would be the spacing of the molecules that is important.ensity is actually a measure of the mass or weight of the molecules in matter and their spacing. The biggest difference between lead and water is their molecular weights. But if you were to compare a liquid's density with a gas, it would be the spacing of the molecules that is important.