With RRMS, the patient experiences relapses (attacks, exacerbations, or flare-ups) during which there are increased symptoms and/or a worsening of neurologic function, followed by partial or complete recovery (or remission). Much more common: RRMS is much more common than progressive courses of MS, which only affect 10% to 15% of patients.
Vapor density is the density of a vapour in relation to that of hydrogen.It may be defined as mass of a certain volume of a substance divided by mass of same volume of hydrogen. vapor density = mass of n molecules of gas / mass of n molecules of hydrogen.Therefore:vapour density = molar mass of gas / molar mass of H 2.or example, acetone has a vapour density of 2 in relation to air. That means acetone vapour is twice as heavy as air. This can be seen by dividing the molecular weight of Acetone, 58.1 by that of air, 28.97, which equals 2.
Since equal volumes of each liquid was weighed, the one that weighed the most is the most dense and the one that weighed the least is the least dense. A density tower From weighing the liquids, the relative densities of the liquids are known: Corn syrup is the most dense; Vegetable oil is the least dense; Water is in between. Carefully pour the liquids in a clear plastic cup from most dense to least dense. The liquids will float or sink on one another based on their densities.