SSC MCQ Question Ans. Concept of Mole and Chemical calculations
SSC MCQ Question Ans. The concept of Mole and Chemical Calculations. In performing a chemical reaction, it is indeed necessary for a chemist to determine what amount of substance is to use as the reactant and what amount of product and byproduct and unwanted substances are produced. Particularly, in chemical industries, this calculation is a must for economic considerations. This is why the number of molecules and the number of atoms and ions in a molecule of reactant and product of a chemical reaction are to be calculated.
Molecules, ions, and atoms are so small particles that, they cannot be calculated as pairs, fours, dozens, hundreds, thousands even not in core. Chemists use a large number to count molecules, ions, and atoms. The value of this number is 6.02 × 1023. According to the name of Italian scientist Amedeo Avogadro, this number is called the Avogadro number or Avogadro The amount of a substance containing 6.02 × 1023 number of molecules, ions and atoms are called mole. In chemistry, calculation of molecule, atom, ion, reactant, and product is known as Stoichiometry.
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