Avogadro’s number is so large that the only way to visualize it is through analogies. For example, one Avogadro’s number of regular-sized mandrian orange 6.02 x 1023 of them, would cover the surface of the United States to a depth of 650 miles. If the average volume of mandrian oranges is 1.4 x 10-14 km3 and the entire volume of the US, including bodies of water, is 6.9 x 109 km3.  Can this claim be true?  How would you check?  Come up with an analogy of your own.

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Stoichiometry

Stoichiometry is a chemical division that evaluates the quantitative content of the chemical process with the help of the reacting molecules or products taking part in the reaction. The term “stoicheion” in “Stoichiometry”, is an old Greek term for "element" whereas “metron” means "measure".