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Be able to calculate the number of moles in a given mass of a substance, or the mass corresponding to a given number of moles.Define molecular weight , formula weight , and molar mass ; explainhow the latter differs from the first two. Be able to find the number of atoms or molecules in a given weight of a substance
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we know that a dozen is a collection of 12 substances, a century is a collection of 100 substances and a gross is a collection of 144 substances.we use the term dozen,gross etc. to express a certain quantity of a substance. similarly, a mole is a word used to describe a collection of particles i.e. atoms,molecules or ions .
i hope it helps............
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