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Which of the following statements is the most accurate with regard to the significance of Avogadro's number, 6.02×10²³?
(A) It is the conversion factor between grams and atomic mass units.
(B) It is a universal physical constant just as the speed of light.
(C) It is the number of particles that is required to fill a 1 L container
(D) It is the inverse diameter of an H atom

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Last updated date: 21st Jul 2024
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Answer
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Hint :Avogadro's number is 6.02214076×10²³, which is the number of units in one mole of any material (defined as its molecular weight in g.). Depending on the nature of the product and the nature of the reaction, the units can be electrons, atoms, ions, or molecules.

Complete Step By Step Answer:
Avogadro's number is 6.02214076×10²³, which is the number of units in one mole of any material (defined as its molecular weight in g.). Depending on the nature of the product and the nature of the reaction, the units can be electrons, atoms, ions, or molecules.
It is the factor that converts grams to atomic mass units.
One AMU equals 1.6×10⁻²⁴ gram, and a carbon atom weighs 12 AMU. In contrast, one grams is equal to 6.022×10²³ AMU, also known as Avogadro's number.
A mass equal to one twelfth the mass of a carbon-12 atom is known as an atomic mass unit. The mass of any element's isotope is measured in comparison to the carbon-12 standard. One atom of helium-4, for example, has a mass of 4.0026 amu.
Hence, option A is correct.

Note :
A mass equal to one twelfth the mass of a carbon-12 atom is known as an atomic mass unit. The mass of any element's isotope is measured in comparison to the carbon-12 standard. One atom of helium-4, for example, has a mass of 4.0026 amu.