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BHU PMT BHU PMT (Mains) Solved Paper-2005

  • question_answer
    Number of gram of oxygen in 322 g of\[N{{a}_{2}}S{{O}_{4}}-10{{H}_{2}}O\]is:

    A)  20.8                                      

    B)  224

    C)  208                                       

    D)  22.4

    Correct Answer: B

    Solution :

                     1 mol of\[N{{a}_{2}}S{{O}_{4}}-10{{H}_{2}}O\]has 14 g-atom of oxygen, or 322 g of\[N{{a}_{2}}S{{O}_{4}}.10{{H}_{2}}O\]has\[14\times 16=224\text{ }g\]of oxygen.


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