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ashna

Can anyone teach me mole concept .. please ?

  • one year ago
  • one year ago

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  1. waterineyes
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    I am in a doubt from where should I start.. Firstly tell me what you know about Mole concept till now?? Don't worry just tell me what you know about this ??

    • one year ago
  2. ashna
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    to be frank i dont know anything , this is my new chapter . the teacher taught something but nothing did enter my brain , my only hope is you now , teach my like how yu teach first grader .. please , having my test this wednesday !

    • one year ago
  3. waterineyes
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    Ha ha ha.. I don't know nothing about it.. but don't worry I will give you what I know about this..

    • one year ago
  4. waterineyes
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    See, to measure any quantity you will need a suitable measure for it.. Right??

    • one year ago
  5. ashna
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    yes

    • one year ago
  6. waterineyes
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    Say for example: You have 12 bananas.. So for simplicity or measuring it you say it is 1 dozen. 12 bananas = 1 Dozen So, here you have measured 12 bananas by saying 1 Dozen of bananas.. Getting ??

    • one year ago
  7. ashna
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    yea .. getting it :)

    • one year ago
  8. waterineyes
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    Now you know in even a small substance or quantity, there are very large number of atoms and molecules.. These atoms and molecules are very small so in even in a very small quantity they are present in very large amount.. Getting this ??

    • one year ago
  9. ashna
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    yea got it !

    • one year ago
  10. waterineyes
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    So, here If I want to measure these atoms and molecules I need a suitable measure for it too so that I can measure or define these large numbers of atoms or molecules with ease.. So for that we need Mole Concept.. Got this??

    • one year ago
  11. ashna
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    yea .. thanks water , you dont teach lyk how my teache did :D

    • one year ago
  12. waterineyes
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    Insulting me?? Ha ha ha.. Never mind..

    • one year ago
  13. waterineyes
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    Wanna proceed further ??

    • one year ago
  14. ashna
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    hey am nt insulting ,i meant to say you were teaching very wel and nothing like how my teacher did .. of course .. please proceed !

    • one year ago
  15. waterineyes
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    I was just kidding @ashna

    • one year ago
  16. ashna
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    :)

    • one year ago
  17. waterineyes
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    You should remember this : Basically, we use idea of mole or Mole concept to count at the Microscopic Level.. By Microscopic Level, we mean very small particles like atoms, molecules, electrons, ions etc.. These are counted in Microscopic Levels. Getting the wordings here ??

    • one year ago
  18. waterineyes
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    *to count entities..

    • one year ago
  19. ashna
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    yea getting :)

    • one year ago
  20. waterineyes
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    So now we will define What Mole is..

    • one year ago
  21. ashna
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    okay !

    • one year ago
  22. waterineyes
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    This is the book definition of Mole.. you can check in your book..

    • one year ago
  23. ashna
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    one mole = 6.023 * 10^23 molecules ?

    • one year ago
  24. waterineyes
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    Yes but its the value.. I am talking about definition..

    • one year ago
  25. ashna
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    oh okay .. !

    • one year ago
  26. waterineyes
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    \(\color{blue}{\text{Mole}}:\) One Mole is the amount of a Substance that contains as many particles (entities) as there are atoms in exactly \(12 \;grams \) of the \(^{12}C\) isotope.

    • one year ago
  27. waterineyes
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    This is book definition.. I explain you best to my knowledge..

    • one year ago
  28. waterineyes
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    There \(C\) is Carbon..

    • one year ago
  29. ashna
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    okay !

    • one year ago
  30. waterineyes
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    @ashna , do you know for measuring any quantity we keep some standards for measuring any quantity..

    • one year ago
  31. ashna
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    like fore mass , kg ?

    • one year ago
  32. waterineyes
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    Close to it.. I explain you.. For mass it is kg.. But we should make some standards which will define what kg is.. We first make standards for kg so that we can say this much amount is kg.. So that whole world can follow the same..

    • one year ago
  33. ashna
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    yeah okay !

    • one year ago
  34. waterineyes
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    That is called Standardization of something. For length it is meters of course.. but we will standardize the meter.. Suppose this will create problem if I say 100cm is 1 meter and you will say no 200 cm is 1 meter.. In that case we will fight.. Right ??

    • one year ago
  35. ashna
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    yeah .. we will :P

    • one year ago
  36. waterineyes
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    So to standardize the Mole we measure all the atoms in 12 grams of Carbon and the result we got from that we call it as one mole..

    • one year ago
  37. ashna
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    wow .. i understood :D

    • one year ago
  38. ashna
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    then .. ?

    • one year ago
  39. waterineyes
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    Okay..

    • one year ago
  40. waterineyes
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    Now we will find its value and define Avagadro's Number.. Heard the name ??

    • one year ago
  41. ashna
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    yeah !

    • one year ago
  42. waterineyes
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    I am just telling you but if you want then you can leave it too: By using a device called "Mass Spectrometer" (used to find Mass) physicists calculate the MASS OF ONE ATOM OF CARBON (\(^{12}C\)) to be: \[\large 1.992648 \times 10^{-23} \; g\]

    • one year ago
  43. waterineyes
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    Do you know the Atomic Mass of Carbon ??

    • one year ago
  44. ashna
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    oh .. never heard of that , ty :)

    • one year ago
  45. ashna
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    12 ?

    • one year ago
  46. waterineyes
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    Yep..

    • one year ago
  47. ashna
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    okay !

    • one year ago
  48. ashna
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    then ?

    • one year ago
  49. waterineyes
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    So we calculate the value of mole by using: \[Number \; \; of \; \; Atoms = \frac{Mass}{Mass \; of \; One \; Atom}\]

    • one year ago
  50. waterineyes
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    You can say 1 Mole also in place of Number Of Atoms.. \[\large 1 \; Mole = \frac{12}{1.992648 \times 10^{-23}}\]

    • one year ago
  51. ashna
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    understood !

    • one year ago
  52. waterineyes
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    You can say 1 Mole also in place of Number Of Atoms.. \[\large 1 \; Mole = \frac{12}{1.992648 \times 10^{-23}}\] \[\large 1 Mole = 6.023 \times 10^{23}\]

    • one year ago
  53. ashna
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    okay .. can you tell me the difference between mole and molecules ?

    • one year ago
  54. waterineyes
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    Mole is a measuring quantity.. Molecule is like formed by atoms.. \[O_2\] this is molecule.

    • one year ago
  55. ashna
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    okay !

    • one year ago
  56. waterineyes
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    This is called Oxygen Molecule..

    • one year ago
  57. waterineyes
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    Actually mole will contains molecules. Suppose 1 mole will contains 6.023*10^{23} molecules of Oxygen..

    • one year ago
  58. waterineyes
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    *will contain..

    • one year ago
  59. ashna
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    so you mean 1 C and 1 O contains same number of molecules ? or is it the same for all elements ?

    • one year ago
  60. waterineyes
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    Just similar to : 1 Dozen will contain 12 Bananas. 1 Mole will contain 6.023*10^{23} molecules..

    • one year ago
  61. ashna
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    okay !

    • one year ago
  62. waterineyes
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    Yes coming to your question right now..

    • one year ago
  63. waterineyes
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    See if you are talking about atoms then 6.023*10^{23} atoms.. If you are talking about molecules then 6.023*10^{23} molecules.. I give you example have patience..

    • one year ago
  64. ashna
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    okay :)

    • one year ago
  65. waterineyes
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    1 Mole of Hydrogen Atoms = \(6.023 \times 10^{23}\) hydrogen atoms. 1 Mole of Water Molecules = \(6.023 \times 10^{23}\) water molecules..

    • one year ago
  66. ashna
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    okay

    • one year ago
  67. waterineyes
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    1 Mole of Carbon Atoms = \(6.023 \times 10^{23}\) Carbon atoms. 1 Mole of Oxygen Atoms = \(6.023 \times 10^{23}\) Oxygen atoms..

    • one year ago
  68. ashna
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    yeah .. now i can understand :)

    • one year ago
  69. waterineyes
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    Coming to Avagadro's Number..

    • one year ago
  70. ashna
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    is that tough ?

    • one year ago
  71. waterineyes
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    1 Mol is given other name as "Avagadro's Constant" So: \(6.023 \times 10^{23}\) is the value for :Avagadro's Constant".. Avagadro's Constant is denoted by \(N_A\); So: \[N_A = 6.023 \times 10^{23}\]

    • one year ago
  72. waterineyes
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    Is this tough?? Ha ha ha

    • one year ago
  73. ashna
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    why laughing ?

    • one year ago
  74. waterineyes
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    My habbit..

    • one year ago
  75. ashna
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    you got brains .. and my brains have just started developing .. that too after entering into open study !

    • one year ago
  76. waterineyes
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    No I did not mean that @ashna ..

    • one year ago
  77. ashna
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    i dont like chem , phy or math .. am only into literature !

    • one year ago
  78. ashna
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    oh god .. am not making you feel or anything .. am just talking naturally .. am sorry if you felt for it !

    • one year ago
  79. waterineyes
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    Literature?? Great.. Here Literature section is also there. You can spend your time there also..

    • one year ago
  80. ashna
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    i know :)

    • one year ago
  81. ashna
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    Na means ?

    • one year ago
  82. waterineyes
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    It is denotion for Avagadro's constant..

    • one year ago
  83. waterineyes
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    I mean you can represent Avagadro's Number or constant as: \[Avagadro's \; Constant = N_A = 1 Mole = 6.023 \times 10^{23}\]

    • one year ago
  84. ashna
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    okay .. and may i know if it is 10^22 or 10^23 or both ?

    • one year ago
  85. waterineyes
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    Not both: only 23..

    • one year ago
  86. waterineyes
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    I am using 23 everywhere..

    • one year ago
  87. waterineyes
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    \[\huge 1 Mole = 6.023 \times 10^{23}\]

    • one year ago
  88. ashna
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    scroll up and see what you wrote for avagadros constant 1

    • one year ago
  89. waterineyes
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    1 Mol is given other name as "Avagadro's Constant" So: \(6.023 \times 10^{23}\) is the value for :Avagadro's Constant".. Avagadro's Constant is denoted by \(N_A\); So: \(N_A=6.023×10^{23}\) Here ??

    • one year ago
  90. ashna
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    yea ..

    • one year ago
  91. ashna
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    is it 22 for avagadro's constant ?

    • one year ago
  92. waterineyes
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    Where I have written 22 then ??

    • one year ago
  93. waterineyes
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    No..

    • one year ago
  94. waterineyes
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    It has the same values as 1 Mole has...

    • one year ago
  95. ashna
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    *10^23 ? is what you have written ?

    • one year ago
  96. ashna
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    looks like 22 to me .. its okay , next week ll hav eye check up .. you continue :)

    • one year ago
  97. waterineyes
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    Yes.. Right click on that then select Show Math As and then text commands if you want to confirm..

    • one year ago
  98. ashna
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    its okay .. i trust you ;)

    • one year ago
  99. waterineyes
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    What I can explain more in this ?

    • one year ago
  100. waterineyes
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    Do you know about Molar Mass ??

    • one year ago
  101. ashna
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    teach me how to do the sums !

    • one year ago
  102. waterineyes
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    Ha ha ha... My weakest part..

    • one year ago
  103. waterineyes
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    Do you know what is molar mass ??

    • one year ago
  104. ashna
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    what is molar mass .. ?

    • one year ago
  105. ashna
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    some problem with my net connection .. that's why i seemed offline sorry !

    • one year ago
  106. ashna
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    am sorry again !

    • one year ago
  107. waterineyes
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    See @ashna I am helping you and I had studied these 5 years ago I am not good at these but I am seeing what I can do this for you in this. Don't say sorry it is okay..

    • one year ago
  108. waterineyes
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    And we have other members too so don't worry we are on safe side..

    • one year ago
  109. ashna
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    okay .. but i prefer you .. u've been the one who has been helping me from the begining in OS !

    • one year ago
  110. ashna
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    what is molar mass ?

    • one year ago
  111. waterineyes
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    Molar Mass is: See once you have found 1 Mole of any substance then Mass of that 1 Mole of substance in grams in called Molar Mass..

    • one year ago
  112. ashna
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    okay .. partly understood .. examples in stock ?

    • one year ago
  113. waterineyes
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    This is my wording not according to the book: According to the book definition: Molar Mass: The Mass of one Mole of a substance in grams is called Molar Mass.. I give you example..

    • one year ago
  114. ashna
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    okay !

    • one year ago
  115. waterineyes
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    Can you tell me molecular mass of Water ??

    • one year ago
  116. ashna
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    i dont know !

    • one year ago
  117. waterineyes
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    \(H_2O = 2 \times 1 + 16 = 18 \)

    • one year ago
  118. ashna
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    oh okay !

    • one year ago
  119. waterineyes
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    there are two H: H has mass equal to 1. So 2 H's will have 2 there is one O: oxygen has 16 as its mass: 16 2 + 16 = 18 Have you studied about molecular mass ?/

    • one year ago
  120. ashna
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    if this is called molecular mass.. then yes , some basics in my 8th !

    • one year ago
  121. ashna
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    am not sure with the names !

    • one year ago
  122. waterineyes
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    Remember : This is called Molecular Mass..

    • one year ago
  123. ashna
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    okay !

    • one year ago
  124. ashna
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    you ask me the molecular mass of something.. let me try !

    • one year ago
  125. waterineyes
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    Then Molar Mass is simple just very simple: Molar Mass = 18 grams..

    • one year ago
  126. ashna
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    oh .. just write it in terms of g ?

    • one year ago
  127. waterineyes
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    Find the molecular mass of Sodium Chloride (Salt). Do you know symbolically what is it ??

    • one year ago
  128. ashna
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    nacl ?

    • one year ago
  129. waterineyes
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    Yes can you find its molecular mass ?/

    • one year ago
  130. ashna
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    let me try !

    • one year ago
  131. waterineyes
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    I am attaching here some flash file hope you will like it..

    • one year ago
  132. ashna
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    atomic mass of Na is 23 atomic mass of Cl is 35.5 add them both ?

    • one year ago
  133. waterineyes
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    I will send you by other means it will take time to upload here.. Yes add them both..

    • one year ago
  134. ashna
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    okay !

    • one year ago
  135. ashna
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    58.5

    • one year ago
  136. ashna
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    molar mass 58.5g ?

    • one year ago
  137. waterineyes
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    yep..

    • one year ago
  138. ashna
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    :)

    • one year ago
  139. waterineyes
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    Can you give me the question on mole concept so that I can explain you how to do it.. I am unable in finding it..

    • one year ago
  140. waterineyes
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    Wait. This has gone long. Start a new post..

    • one year ago
  141. ashna
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    okay :)

    • one year ago
  142. waterineyes
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    I mean to say that can we start a new post @ashna

    • one year ago
  143. ashna
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    yea okay !

    • one year ago
  144. waterineyes
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    Medal for finding molecular mass of NaCl..

    • one year ago
  145. ashna
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    lol .. thanks :)

    • one year ago
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