JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry Question Bank Atomic Molecular and Equivalent masses

  • question_answer If the density of water is 1 g \[c{{m}^{-3}}\]then the volume occupied by one molecule of water is approximately             [Pb. PMT 2004]

    A)                 \[18\,\,c{{m}^{3}}\]          

    B)                 \[22400\,\,c{{m}^{3}}\]

    C)                 \[6.02\times {{10}^{-23}}\,\,c{{m}^{3}}\] 

    D)                 \[3.0\times {{10}^{-23}}\,\,c{{m}^{3}}\]

    Correct Answer: D

    Solution :

               \[d=\frac{M}{V}\]; \[1=\frac{M}{V}\] or M = V; 18gm = 18ml                    \[6\times {{10}^{23}}\]molecule of water has volume =18cc                    1 molecule of water has volume \[=\frac{18}{6\times {{10}^{23}}}\]                                                                     \[=3\times {{10}^{-23}}c{{m}^{3}}\].


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