2. Questions Bank
  3. 9th Class
  4. Science
  5. Atoms and Molecules

9th Class Science Atoms and Molecules Question Bank Atoms and Molecules

  • question_answer
    Calculate the weight in grams of \[0.75\] gram moles of\[NaHC{{O}_{3}}\].

    A) \[64\,\,g\]                      

    B)        \[63\,\,g\]  

    C) \[65\,\,g\]                      

    D)        \[66\,\,g\]

    Correct Answer: B

    Solution :

     \[G.M.W.\] of\[NaHC{{O}_{3}}\]             \[=23+1+12+16\times 3=84\,\,g\] \[1\] gram mole of\[NaHC{{O}_{3}}\], weights\[=84\,\,g\] \[0.75\] gram mole of\[NaHC{{O}_{3}}\]weights\[=\] \[0.75\times 84=63\,\,g\]


You need to login to perform this action.
You will be redirected in 3 sec spinner