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Atoms and Molec...

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  • Question 1
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    The formula unit mass of $$Ca_3 (PO_4)_2$$ is :

  • Question 2
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    Which of the following obeys the law of constant proportions in their formation?

  • Question 3
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    The number of atoms in one mole of a substance is equal to ................ ?

  • Question 4
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    Rahul dropped 150 g of marble chips into 1 kg of HCl solution containing 0.1 of its weight of pure acid. The mass of marble chips that remained undissolved will approximately be:

  • Question 5
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    Calculate the molecular mass of the caustic potash :

  • Question 6
    1 / -0

    The molecular weight of calcium carbonate $$CaCO_{3}$$ is:

  • Question 7
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    The weight of $$100$$ molecules of each of the following substances is:
    (a) Chlorine gas
    (b) Calcium oxide

  • Question 8
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    Total number of atoms in 20 g of calcium carbonate is ________.

  • Question 9
    1 / -0

    Avogadro's number is ?

  • Question 10
    1 / -0

    The ratio by mass of sulphur and oxygen in $$SO_2$$ is:

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