GRAM MOLECULAR WEIGHT Meaning and
Definition
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Gram molecular weight refers to the mass of one mole of a substance in grams. It is a unit used to describe the amount of a chemical compound. In chemistry, a mole is defined as the amount of a substance that contains the same number of atoms, molecules, or ions as there are atoms in exactly 12 grams of carbon-12. The gram molecular weight, therefore, represents the mass of this standardized quantity of a substance.
To calculate the gram molecular weight, one must add up the atomic masses of all the atoms in a molecule. This is done by multiplying the atomic mass of each element by the number of atoms of that element in the molecule and summing the results. The value obtained is expressed in grams.
The gram molecular weight is an important concept in stoichiometry, which is the study of the quantitative relationship between reactants and products in chemical reactions. It allows chemists to determine the amount of a substance needed for a reaction or the amount produced from a reaction.
For example, if one wants to know the amount of sodium chloride (NaCl) needed to react with a certain amount of silver nitrate (AgNO3), the gram molecular weight of NaCl can be used to convert the given quantity of AgNO3 into moles. This provides the necessary information to determine the amount of NaCl required for the reaction based on the stoichiometry of the balanced equation.
In summary, the gram molecular weight is the mass of one mole of a substance expressed in grams. It is a crucial parameter for calculating the quantities of substances involved in chemical reactions.
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