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1 mole by definition represents same num...

1 mole by definition represents same number of particles as

A

Number of atoms present in exactly 8 g of `._8^16O` isotope.

B

Number of molecules in exactly 2 g of `H_2` gas

C

Number of atoms present in exactly 16 g of `._8^16O` isotope

D

Number of atoms present in exactly 12 g of `._6^12C` isotope

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Explore conceptually related problems

Fill in the following blanks : (a) 1 mole contains "…………." atoms, molecules or ions of a substance. (b) A mole represents an "…………." number of particles of a substances. (c ) 60 g of carbon element are "…………." moles of carbon atoms. (d) 0.5 mole of calcium element has a mass of "…………." . (e) 64 g of oxygen gas contains "…………." moles of oxygen atoms.

Assertion : 1 mole of N and 1 mole of N_(2) contain equal number of particles Reason : 1 mole of molecules of always double than 1 mole of atoms in all the diatomic molecules.

Assertion: Equal moles of different substnaces contains same number of constituent particles. Reason: Equal weights of different substances contain the samme number of contituent particles.

You are given the following group of particles n_(1) represents the number of molecules with speed upsilone_(1)

In the diagram (given below) the broken lines represent the paths followed by particles W,X, Y and Z respectively through the constant field E. The numbers below the field represents meters. \ If the particles begin and end at rest, and all are positively charged, the same amount of work was done on which particles.

Knowledge Check

  • PASSAGE-I :A mole of an atom is a collection of atoms whose total mass is the number of grams equal to the atomic mass. Since equal number of moles of different elements contain an equal number of atoms it becomes convenient to express the amounts of the elements in terms of moles. A mole represents a definite number of particles viz, atoms, molecules, ions or electrons. This definite number is called Avogadro number or Avogadro constant which is equal to 6.022 xx 10^(23) Hence a mole represents 6.022 xx 10^(23) particles of the substance. One mole of substance represents one gram-formula of the substance. One mole of a gas at standard temperature and pressure occupies 22.4 litres. How many grams of sodium must be taken to get 1 mole of the element ?

    A
    23 g
    B
    35.5 g
    C
    63.5 g
    D
    46 g

  • PASSAGE-I :A mole of an atom is a collection of atoms whose total mass is the number of grams equal to the atomic mass. Since equal number of moles of different elements contain an equal number of atoms it becomes convenient to express the amounts of the elements in terms of moles. A mole represents a definite number of particles viz, atoms, molecules, ions or electrons. This definite number is called Avogadro number or Avogadro constant which is equal to 6.022 xx 10^(23) Hence a mole represents 6.022 xx 10^(23) particles of the substance. One mole of substance represents one gram-formula of the substance. One mole of a gas at standard temperature and pressure occupies 22.4 litres. How many number of moles are there in 5.75 g of sodium ? (Atomic mass of sodium = 23)

    A
    0.25
    B
    0.5
    C
    1
    D
    2.5

  • PASSAGE-I :A mole of an atom is a collection of atoms whose total mass is the number of grams equal to the atomic mass. Since equal number of moles of different elements contain an equal number of atoms it becomes convenient to express the amounts of the elements in terms of moles. A mole represents a definite number of particles viz, atoms, molecules, ions or electrons. This definite number is called Avogadro number or Avogadro constant which is equal to 6.022 xx 10^(23) Hence a mole represents 6.022 xx 10^(23) particles of the substance. One mole of substance represents one gram-formula of the substance. One mole of a gas at standard temperature and pressure occupies 22.4 litres. What is the mass in grams of a single atom of chlorine? (Atomic mass of chlorine = 35.5)

    A
    `6.54 xx 10^(23) g`
    B
    `5.9 xx 10^(-23)` g
    C
    0.0025 g
    D
    35.5 g
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    2. The weight of a molecule of the compound C6H12O6 is about :

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    3. The mass of half mole of electrons is about (Given: Mass of electron =...

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    4. 39.4 kg of gold was recovered from a smuggler. The number of atoms of ...

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    5. The charge on 1 gram ions of AI^(3+) is . (a). (1)/(27) N(A)e coulomb ...

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    6. Calculate the number of atoms in 0.5 mole atoms of nitrogen.

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    7. In which of the following pairs do 1 g of each have an equal number of...

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    8. The number of atoms in 4.25 g of NH(3) is approximately

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    11. 124 g of P4 will contain which of the following : (1) 4 atoms of ...

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