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Why is the value of Avogadro's number 6....

Why is the value of Avogadro's number `6.022 xx 10^(23)` and not any other value ?

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It represents the number of atoms in one gram atom of an element or the number of molecules in one gram mole of a compound. If we divide the atomic mass of an element by actual mass of its atom, the value is `6.022 xx 10^(23)`. Similarly, by dividing the molecular mass of a compound by the actual mass of its molecules, the same result is obtained.
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(a) Why does not the atomic mass of an element represent the actual mass of its atom? (b) The atomic mass of an element is in fraction. What does it mean? (c) Why is the value of Avogadros number 6.022 xx 10^(23) and not any other value? (d Does one gram mole of a gas occupy 24.4 L under all conditions of temperature and pressure?

If the value of Avogadro number is 6.023 xx 10^(23) mol^(-1) and the value of Boltzmann constant is 1.380 xx 10^(-23)J K^(-1) , then the number of significant digits in the calculated value of the universal gas constant is

Knowledge Check

  • The value of Avogadro number is

    A
    `6.02xx10^-24`
    B
    `6.02xx10^-25`
    C
    `6.02xx10^23`
    D
    `6.02xx10^26`

    • Similar Questions

    Explore conceptually related problems

    If the value of Avogadro's number is 6.023xx10^(23)"mol"^(-1) and the value of Boltzman constant is 1.380xx10^(-23)JK^(-1) . The number of significant digits in the calculated value of the universal gas constant is:

    What is the value of Avogadro's number of particles?

    If the value of Avogadro number is 6.023 xx 10^23 "mol"^(-1) and the value of Boltzmann constant is 1.380 xx 10^(-23) JK^(-1) , then the number of significant digits in the calculated value of the universal gas constant is [Hint: Since k and N, both have four significant figures, the value of R is also rounded off up to four significant figures.]

    Mole concept is an important tool for dealing with chemical calculations. The element have atomic mases while compounds have molecular masses or molar masses. Mole is infact, a collection of Avogadro's number (N_(A)) of the particles of a substance whether element or compound. The value of Avogadro's number is 6.022 xx 10^(23) (a) Why is mole commonly called chemist's dozen ? (b) What is the value associated with the term mole ?

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    If the value of Avogadro number is 6.023times10^(23)mol^(-1) and the value of Boltzmann constant is 1.380times10^(-23)JK^(-1),then the number of significant digits in the calculated value of the universal gas constant is

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