Table of Contents
What does high 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.
What is molecular weight the same as?
The term molecular weight defined as the mass of a molecule. It is also known as the relative molecular mass is another because molecular weight calculated as the mass that is relative to the carbon -12 isotopes.
Is MW the same as molar mass?
Molecular weight is the mass of one molecule of a compound, while molar mass is the mass of one mole of a compound.
What is the molecular weight of air 29?
28.9647 g/mol
Oxygen has a molar mass of 15.9994 g/mol and nitrogen has a molar mass of 14.0067 g/mol. Since both of these elements are diatomic in air – O2 and N2, the molar mass of oxygen gas is 32 g/mol and the molar mass of nitrogen gas is 28 g/mol. The molar mass of dry air is 28.9647 g/mol.
What is the molecular weight of DNA?
The average weight of a single DNA bp is 650 daltons. This can also be written as 650 g/mol (= molar mass).
Why does viscosity increase with molecular weight?
The larger the polymer, the more drag and also the more intermolecular attraction, and so the higher the viscosity. So, the viscosity increases with the molecular weight, but not necessarily in a linear way.
Is molecular weight equal to mole?
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.
What is molecular weight unit?
Kilogram per mole
Molar mass/SI units
How to calculate molecular weight?
Count how many atoms of each element exist in the molecule. First, list each element present in the molecule.
How do you calculate the average molecular weight?
The average molecular weight of air can be calculated by adding the products of the molecular weights of each of its components (e.g., oxygen, nitrogen, carbon dioxide, etc.) times their respective percentages all divided by 100.
Is molecular weight the same as molecular mass?
Molar mass and molecular weight are often confused, but their values are very different. Molar mass is the mass of one mole of a substance, while molecular weight is the mass of one molecule of a substance. One mole is the number of particles, such as atoms, molecules, ions or electrons, in a substance.
How do you calculate the molecular weight of a compound?
If the formula used in calculating molar mass is the molecular formula, the formula weight computed is the molecular weight. The percentage by weight of any atom or group of atoms in a compound can be computed by dividing the total weight of the atom (or group of atoms) in the formula by the formula weight and multiplying by 100.