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.
Stuart W. Share. Nov 20, 2015. Divide the mass of a particular element by the molar mass of that element. Moles# = (mass)/(Molar Mass)#. You can find the molar mass of an element off of the periodic table. Since molar mass is measured in g/mol, dividing mass by molar mass cancels the mass unit (grams) leaving only a number of moles as your answer.