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Class 11
Chemistry :-Additional Questions_ Set - 1 - Some Basic Concepts Of Chemistry.

 “One mole of all substances contain the same number of specified particles”.
a. Justify the statement.
b. What is the relation between mole and volume?

Answer:

a. The amount of substance that contain Avogadro number. 6.022×1023 particles of any substance is termed as mole,
eg., one mole of O-atom contain 6.022 ×1023 atom of O2. One mole of O2 mole cule contain 6.022×1023 molecules of O2.
b.The volume occupied by one mole of a gas in molar volume. At STP, 1 mole occupies 22.4 L. 1 mole of O2 at STP has volume 22.4 L.

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NCERT Chemistry Class 11

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