JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank The mole concept

  • question_answer
    The total number of protons in 10 g of calcium carbonate is (\[{{N}_{0}}=6.023\times {{10}^{23}}\])

    A)                 \[1.5057\times {{10}^{24}}\]         

    B)                 \[2.0478\times {{10}^{24}}\]

    C)                 \[3.0115\times {{10}^{24}}\]         

    D)                 \[4.0956\times {{10}^{24}}\]

    Correct Answer: C

    Solution :

               \[\because \]   100gm \[CaC{{O}_{3}}\ =6.023\times {{10}^{23}}\]molecules                    \[\therefore \]   10gm  \[CaC{{O}_{3}}\]=\[\frac{6.023\times {{10}^{23}}}{100}\times 10\]                                                  \[=6.023\times {{10}^{22}}\] molecule                    1 molecule of \[CaC{{O}_{3}}\]= 50 protons                    \[6.023\times {{10}^{22}}\]molecule of \[CaC{{O}_{3}}\]\[=50\times 6.023\times {{10}^{22}}\]                                                                                     \[=3.0115\times {{10}^{24}}\]


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