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NEET Sample Paper NEET Sample Test Paper-42

  • question_answer
     How many moles of magnesium phosphate, \[{{\operatorname{Mg}}_{3}}{{\left( P{{O}_{4}}  \right)}_{2}}\]will contain 0.25 mole of oxygen atoms?

    A) \[2.5\times {{10}^{-2}}\]        

    B) 0.02

    C) \[3.125\times {{10}^{-2}}\]                  

    D) \[1.25\times {{10}^{-2}}\]

    Correct Answer: C

    Solution :

    Molar mass of \[{{\operatorname{Mg}}_{3}}{{\left( P{{O}_{4}} \right)}_{2}}=80\] \[\therefore 0.25 mole oxygen atoms =\frac{0.25}{8}=3.125\times 1{{0}^{-2}}\]Mole of \[{{\operatorname{Mg}}_{3}}{{\left( P{{O}_{4}} \right)}_{2}}\]


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