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.
mass of ONE MOLE (6.02x10^23 particles) of a substance, used b/c we cannot mass out 1 particle of a substance (way too small), but we can mass 1 mole of a substance (molar mass=proportional to atomic mass) For an element, molar mass=. atomic mass in grams. For a compound, molar mass=.