Question

13.) Assertion: The number of particles (atoms, molecules or ions) present in 1 mole

of any substance is not fixed.

Reason: One mole is the amount of substance containing 6.022 X 1023 particles of a

substance.

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Answer 1

Answer:

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Explanation:

The mole allows scientists to calculate the number of elementary entities (usually atoms or molecules) in a certain mass of a given substance. Avogadro's number is an absolute number: there are 6.022×1023 elementary entities in 1 mole. This can also be written as 6.022×1023 mol-1.