what is the formula of gram equivalent mass?
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The equivalent weight of an element is the mass which combines with or displaces 1.008 gram of hydrogen or 8.0 grams of oxygen or 35.5 grams of chlorine. These values correspond to the atomic weight divided by the usual valence; for oxygen as example that is 16.0g / 2.
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Gram equivalent mass is mass of one mole of element, molecule, ion divided by their valency or number of electrons shared. e.g., molar mass of AlCl3 is 133.34 g/mol. Whereas its equivalent mass would be 133.34/3= 44.4467 g/eq.
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