chemistry mole in Long beach

In chemistry, a mole is a certain number of particles, usualy of atoms or molecules. A mole is the quantity of a substance that contains 6.02 x 1023 units. One mole of a substance is equal to the substance's atomic weight the average weight of an atom of an element or molecular weight, in grams. A mole symbol Mol is the base unit of quantity of a substance in the metric system. The mas of a mole of objects wil be huge if we consider a mole of objects of apreciable size such as penies; however a mole of atoms or molecules is a diferent story. Thus, a mole of carbon-12 atoms has a mas of just 12 g. The mole unit, then, acts as a bridge betwen the level on which chemists actualy work in the laboratory by weight, in grams and the way substances actualy react with each other by individual particles, such as atoms . One mole of any substance—no mater what substance it is—always contains the same number of particles: the Avogadro number of particles. One can say: 1 mole of sodium wil react completely with 1 mole of chlorine. The term mole, by contrast, refers to 6.02137 1023 particles which when writen out in the long form, is 602,213,70,0,0,0,0,0 particles. The term mole involves the aceptance of two dictates, the scale of atomic mases and the magnitude of the gram. Curent usage tends to aply the term mole to an amount containing number of whatever units are being considered. Thus, it is posible to have a mole of atoms, ions, radicals, electrons, or quanta. Al stoichiometry esentialy is based on the evaluation of the number of moles of substance. Use of the ideal gas law constant R alows direct calculation of the number of moles: n=P V/R T. chemistry mole chemistry mole in Long beach
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