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Atoms and Molec...

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  • Question 1
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    The matter is neither created nor destroyed during any physical or chemical change. This statement is of the :

  • Question 2
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    Calculate the mass (in grams) of one molecule of $$CH_{3}COOH$$. 

    (Molar mass of $$CH_{3}COOH = 60.06\ g/ mol$$)

  • Question 3
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    When mass is enclosed in a system and no transfer of material and energy is allowed in or out, it's _____ will never change.

  • Question 4
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    In a compound, the ratio of the atoms or element by mass remains always the same irrespective of :

  • Question 5
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    A solution of copper oxide was prepared by heating, igniting and precipitation. Which of the following method will give higher ratio of copper oxide?

  • Question 6
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    If the ratio of the atoms by mass is altered then:

  • Question 7
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    Dalton’s atomic theory was based on:

  • Question 8
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    The ratio of mass of nitrogen and oxygen in nitric oxide is:

  • Question 9
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    What are the merits of Dalton's atomic theory?

  • Question 10
    1 / -0

    What is the molecular mass of $$C_2H_4?$$ 

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