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Atomic mass of Sodium is-...

Atomic mass of Sodium is-

A

a. 24 U

B

b. 23 U

C

c. 32 U

D

d. 14 U

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Which has more number of atoms 100 g of sodium or 100 g of iron? Justify your answer. Atomic mass of sodium =23 u, atomic mass of iron= 56 u)

Estimate the average mass density of a sodium atom assuming its size to be about 2.5Å. (Use the known values of Avagardo's number and the atomic mass of sodium). Compare it with the mass density of sodium in its crystalline phase : 970 kg m^(-3) . Are the two densities of the same order of magnitude ? If so, why ?

Knowledge Check

  • If the relative atomic mass of oxygen is 64 units, the molecular mass of CO becomes

    A
    112
    B
    128
    C
    28
    D
    7

  • If the relative atomic mass of oxygen is 64 units, the molecular mass of CO becomes

    A
    112
    B
    128
    C
    28
    D
    7

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    Explore conceptually related problems

    Estimate the average mass density of a sodium atom assuming its size to be about 2.5 A^(@) . (Use the known values of Avogadro's number and the atomic mass of sodium). Compare it with the density of sodium in its crystalline phase : 970 kg m^(-3) . Are the two densities of the same order of magnitude ? If so why ?

    Atomic mass of Magnesium is……….

    Atomic mass of oxygen-

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    The atomicity of sodium is……….

    Molecular mass of sodium carbonate is……………U.

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