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Some Basic Conc...

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  • Question 1
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    $$3.011\times { 10 }^{ 22 }$$ atoms of an element weights $$1.15 $$ g. The atomic mass of the element is :

  • Question 2
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    Mass of beaker=10g
    Mass of mixture+beaker=25g
    Mixture contains 30% sand. Find the weight of sand.

  • Question 3
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    One atomic mass is equal to

  • Question 4
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    Which law is not applicable for a nuclear reaction where large amount of energy is released? 

  • Question 5
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    One atomic mass unit is equal to?

    (Given, mass of one carbon-12 atom $$= 1.992 \times 10^{-23}$$)

  • Question 6
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    Avogadro's number is NOT equal to:

  • Question 7
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    Which of the following expressions is equal to the number of iron ($$Fe$$) atoms present in $$10.0$$ g $$\displaystyle Fe$$ ? (atomic mass of $$\displaystyle Fe$$ = $$55.9$$ amu) 

  • Question 8
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    If $$10$$ liters of CO gas react with sufficient amount of oxygen for a complete reaction, how many liters of $$CO_2$$ gas will be formed?

  • Question 9
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    How many grams of $$\displaystyle Na$$ are present in $$30$$ g $$\displaystyle NaOH$$?

  • Question 10
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    A metal nitride contains 28% nitrogen by weight. The molecular formula of metal nitride is $$M_3N_2$$. What is the atomic weight of metal ?

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