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Atoms and Molec...

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  • Question 1
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    Calculate the number of moles in 17 g of hydrogen peroxide (H2O2) 

  • Question 2
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    What weight of Calcium contains the same number of atoms as are present in 2 g of Sulphur?

  • Question 3
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    Which has more molecules - 4 g of methane or 11 g of CO2 ?

  • Question 4
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    One mole of N2 is equal to _________.

  • Question 5
    1 / -0

    Which of the following two statement(s) is/are true?

    Statement A : Mole is quite often known as chemist's dozen. 

    Statement B : The mass of one-twelfth (1/12) of the mass of one atom of Carbon is taken as 1 u.

  • Question 6
    1 / -0

    How many molecules are present in one gram molecular mass of a substance?

  • Question 7
    1 / -0

    The atomic mass of calcium is 40. The number of moles in 60 g of Calcium are:

  • Question 8
    1 / -0

    Match the following with the correct response:

    (1) Nitrate (A) P3−
    (2) Phosphide (B) PO43−
    (3) Nitrite (C) NO2−
    (4) Phosphate (D) NO3−

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