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प्रश्न
What do you understand by the term mole? How many elementary units are in one mole of a substance?
उत्तर
"A mole is defined as the amount (mass) of a substance containing elementary particles like atoms, molecules or ions equal to Avogadro's number i .e. 6.023 x 1023.
Or a collect ion of 6.023 x 1023 particles is called mole.
Number of elementary uni ts present in one mole of a substance is 6.023 x 1023.
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