Superficial destruction of a surface by friction, pressure, ulceration, or trauma. The wearing away of a tooth by chemical or abrasive action. Also called odontolysis. erosion. The gradual wearing away of land surface materials, especially rocks, sediments, and soils, by the action of water, wind, or a glacier.
In chemistry, the molar mass M is a physical property defined as the mass of a given substance (chemical element or chemical compound) divided by its amount of substance. The base SI unit for molar mass is kg / mol.
Molar mass is the weight of one mole (or 6.02 x 1023 molecules) of any chemical compounds. Molar masses of common chemical compounds that you might find in the chemistry laboratory can range between 18 grams/mole for compounds like water to hundreds of grams per mole for more complex chemical compounds.eport Abuse. The molar mass is simply the atomic mass expressed in grams (if your using gram moles, which I'm pretty sure you are). For example, take water, H2O: The atomic mass of water is 2 times the mass of H, plus 1 times the mass of O = 2*(1) + 1*(16) = 18 amu. So one mole of water is 18 grams.