Sage-Tips

What is the relationship between the molecular weight and the size of the molecule?

Molecular size can be expressed in terms of weight (MW) and volume (V). Both are important metrics of toxicity; in general, as molecular size increases, bioavailability and toxicity decrease [16]. For example, at MW > 1000 Da, bioavailability is negligible.

What does higher molecular weight mean?

A High molecular weight increases the chemical resistance – to a point. It takes more damage to the main chains of the molecules before it will affect the strength of the material. A High molecular weight increases the viscosity of the material – makes it harder to process the material using conventional methods.

Are molecular mass and molecular weight the same?

Molecular mass and Molecular weight is not the same, although they use interchangeably. Molecular weight, as a synonym of molar mass, is defined as the mass of a sample of that compound divided by the amount of substance in that sample, measured in moles (g/mol).

What is difference between the mass of a molecule and molecular mass?

Mass of a molecule is that of a single molecule also known as its actual mass. But molecular mass is the mass of Avogadro’s number (6.022×1023) of molecules.

What determines molecular size?

The amount of space any mass takes up in three-dimensional space is known specifically as its volume. Using algebra and the density formula discovered by Archimedes of Syracuse, one can determine the molecular size of a molecule for any given mass of molecular substance.

What is difference between molecular weight and equivalent weight?

The key difference between gram molecular weight and gram equivalent weight is that the term gram molecular weight refers to the mass of a molecule in grams which is numerically equal to the molecular weight of that substance, whereas the term gram equivalent weight refers to the mass of one equivalent in grams.

Which of the following is having higher molecular weight?

Answer: Polymer has the largest molar mass.

What is the relationship between mass moles and molecular weights?

The mass of one mole of a substance is equal to that substance’s molecular weight. For example, the mean molecular weight of water is 18.015 atomic mass units (amu), so one mole of water weight 18.015 grams.

Are molecules smaller than atoms?

Atoms are even smaller than molecules. Molecules are made up of atoms. Dust, air, water, people— everything is made of atoms.

Why do larger atoms have larger dispersion forces?

Larger and heavier atoms and molecules exhibit stronger dispersion forces than smaller and lighter ones. In a larger atom or molecule, the valence electrons are, on average, farther from the nuclei than in a smaller atom or molecule. They are less tightly held and can more easily form temporary dipoles.