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ashna Group Title

Can anyone teach me mole concept .. please ?

  • 2 years ago
  • 2 years ago

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  1. waterineyes Group Title
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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 ??

    • 2 years ago
  2. ashna Group Title
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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 !

    • 2 years ago
  3. waterineyes Group Title
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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..

    • 2 years ago
  4. waterineyes Group Title
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    See, to measure any quantity you will need a suitable measure for it.. Right??

    • 2 years ago
  5. ashna Group Title
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    yes

    • 2 years ago
  6. waterineyes Group Title
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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 ??

    • 2 years ago
  7. ashna Group Title
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    yea .. getting it :)

    • 2 years ago
  8. waterineyes Group Title
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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 ??

    • 2 years ago
  9. ashna Group Title
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    yea got it !

    • 2 years ago
  10. waterineyes Group Title
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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??

    • 2 years ago
  11. ashna Group Title
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    yea .. thanks water , you dont teach lyk how my teache did :D

    • 2 years ago
  12. waterineyes Group Title
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    Insulting me?? Ha ha ha.. Never mind..

    • 2 years ago
  13. waterineyes Group Title
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    Wanna proceed further ??

    • 2 years ago
  14. ashna Group Title
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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 !

    • 2 years ago
  15. waterineyes Group Title
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    I was just kidding @ashna

    • 2 years ago
  16. ashna Group Title
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    :)

    • 2 years ago
  17. waterineyes Group Title
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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 ??

    • 2 years ago
  18. waterineyes Group Title
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    *to count entities..

    • 2 years ago
  19. ashna Group Title
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    yea getting :)

    • 2 years ago
  20. waterineyes Group Title
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    So now we will define What Mole is..

    • 2 years ago
  21. ashna Group Title
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    okay !

    • 2 years ago
  22. waterineyes Group Title
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    This is the book definition of Mole.. you can check in your book..

    • 2 years ago
  23. ashna Group Title
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    one mole = 6.023 * 10^23 molecules ?

    • 2 years ago
  24. waterineyes Group Title
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    Yes but its the value.. I am talking about definition..

    • 2 years ago
  25. ashna Group Title
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    oh okay .. !

    • 2 years ago
  26. waterineyes Group Title
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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.

    • 2 years ago
  27. waterineyes Group Title
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    This is book definition.. I explain you best to my knowledge..

    • 2 years ago
  28. waterineyes Group Title
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    There \(C\) is Carbon..

    • 2 years ago
  29. ashna Group Title
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    okay !

    • 2 years ago
  30. waterineyes Group Title
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    @ashna , do you know for measuring any quantity we keep some standards for measuring any quantity..

    • 2 years ago
  31. ashna Group Title
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    like fore mass , kg ?

    • 2 years ago
  32. waterineyes Group Title
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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..

    • 2 years ago
  33. ashna Group Title
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    yeah okay !

    • 2 years ago
  34. waterineyes Group Title
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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 ??

    • 2 years ago
  35. ashna Group Title
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    yeah .. we will :P

    • 2 years ago
  36. waterineyes Group Title
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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..

    • 2 years ago
  37. ashna Group Title
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    wow .. i understood :D

    • 2 years ago
  38. ashna Group Title
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    then .. ?

    • 2 years ago
  39. waterineyes Group Title
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    Okay..

    • 2 years ago
  40. waterineyes Group Title
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    Now we will find its value and define Avagadro's Number.. Heard the name ??

    • 2 years ago
  41. ashna Group Title
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    yeah !

    • 2 years ago
  42. waterineyes Group Title
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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: \[\large 1.992648 \times 10^{-23} \; g\]

    • 2 years ago
  43. waterineyes Group Title
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    Do you know the Atomic Mass of Carbon ??

    • 2 years ago
  44. ashna Group Title
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    oh .. never heard of that , ty :)

    • 2 years ago
  45. ashna Group Title
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    12 ?

    • 2 years ago
  46. waterineyes Group Title
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    Yep..

    • 2 years ago
  47. ashna Group Title
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    okay !

    • 2 years ago
  48. ashna Group Title
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    then ?

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

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

    • 2 years ago
  51. ashna Group Title
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    understood !

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

    • 2 years ago
  53. ashna Group Title
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    okay .. can you tell me the difference between mole and molecules ?

    • 2 years ago
  54. waterineyes Group Title
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    Mole is a measuring quantity.. Molecule is like formed by atoms.. \[O_2\] this is molecule.

    • 2 years ago
  55. ashna Group Title
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    okay !

    • 2 years ago
  56. waterineyes Group Title
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    This is called Oxygen Molecule..

    • 2 years ago
  57. waterineyes Group Title
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    Actually mole will contains molecules. Suppose 1 mole will contains 6.023*10^{23} molecules of Oxygen..

    • 2 years ago
  58. waterineyes Group Title
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    *will contain..

    • 2 years ago
  59. ashna Group Title
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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 ?

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

    • 2 years ago
  61. ashna Group Title
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    okay !

    • 2 years ago
  62. waterineyes Group Title
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    Yes coming to your question right now..

    • 2 years ago
  63. waterineyes Group Title
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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..

    • 2 years ago
  64. ashna Group Title
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    okay :)

    • 2 years ago
  65. waterineyes Group Title
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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..

    • 2 years ago
  66. ashna Group Title
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    okay

    • 2 years ago
  67. waterineyes Group Title
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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..

    • 2 years ago
  68. ashna Group Title
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    yeah .. now i can understand :)

    • 2 years ago
  69. waterineyes Group Title
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    Coming to Avagadro's Number..

    • 2 years ago
  70. ashna Group Title
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    is that tough ?

    • 2 years ago
  71. waterineyes Group Title
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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: \[N_A = 6.023 \times 10^{23}\]

    • 2 years ago
  72. waterineyes Group Title
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    Is this tough?? Ha ha ha

    • 2 years ago
  73. ashna Group Title
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    why laughing ?

    • 2 years ago
  74. waterineyes Group Title
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    My habbit..

    • 2 years ago
  75. ashna Group Title
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    you got brains .. and my brains have just started developing .. that too after entering into open study !

    • 2 years ago
  76. waterineyes Group Title
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    No I did not mean that @ashna ..

    • 2 years ago
  77. ashna Group Title
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    i dont like chem , phy or math .. am only into literature !

    • 2 years ago
  78. ashna Group Title
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    oh god .. am not making you feel or anything .. am just talking naturally .. am sorry if you felt for it !

    • 2 years ago
  79. waterineyes Group Title
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    Literature?? Great.. Here Literature section is also there. You can spend your time there also..

    • 2 years ago
  80. ashna Group Title
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    i know :)

    • 2 years ago
  81. ashna Group Title
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    Na means ?

    • 2 years ago
  82. waterineyes Group Title
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    It is denotion for Avagadro's constant..

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

    • 2 years ago
  84. ashna Group Title
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    okay .. and may i know if it is 10^22 or 10^23 or both ?

    • 2 years ago
  85. waterineyes Group Title
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    Not both: only 23..

    • 2 years ago
  86. waterineyes Group Title
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    I am using 23 everywhere..

    • 2 years ago
  87. waterineyes Group Title
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    \[\huge 1 Mole = 6.023 \times 10^{23}\]

    • 2 years ago
  88. ashna Group Title
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    scroll up and see what you wrote for avagadros constant 1

    • 2 years ago
  89. waterineyes Group Title
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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 ??

    • 2 years ago
  90. ashna Group Title
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    yea ..

    • 2 years ago
  91. ashna Group Title
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    is it 22 for avagadro's constant ?

    • 2 years ago
  92. waterineyes Group Title
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    Where I have written 22 then ??

    • 2 years ago
  93. waterineyes Group Title
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    No..

    • 2 years ago
  94. waterineyes Group Title
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    It has the same values as 1 Mole has...

    • 2 years ago
  95. ashna Group Title
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    *10^23 ? is what you have written ?

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

    • 2 years ago
  97. waterineyes Group Title
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    Yes.. Right click on that then select Show Math As and then text commands if you want to confirm..

    • 2 years ago
  98. ashna Group Title
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    its okay .. i trust you ;)

    • 2 years ago
  99. waterineyes Group Title
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    What I can explain more in this ?

    • 2 years ago
  100. waterineyes Group Title
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    Do you know about Molar Mass ??

    • 2 years ago
  101. ashna Group Title
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    teach me how to do the sums !

    • 2 years ago
  102. waterineyes Group Title
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    Ha ha ha... My weakest part..

    • 2 years ago
  103. waterineyes Group Title
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    Do you know what is molar mass ??

    • 2 years ago
  104. ashna Group Title
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    what is molar mass .. ?

    • 2 years ago
  105. ashna Group Title
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    some problem with my net connection .. that's why i seemed offline sorry !

    • 2 years ago
  106. ashna Group Title
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    am sorry again !

    • 2 years ago
  107. waterineyes Group Title
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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..

    • 2 years ago
  108. waterineyes Group Title
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    And we have other members too so don't worry we are on safe side..

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

    • 2 years ago
  110. ashna Group Title
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    what is molar mass ?

    • 2 years ago
  111. waterineyes Group Title
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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..

    • 2 years ago
  112. ashna Group Title
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    okay .. partly understood .. examples in stock ?

    • 2 years ago
  113. waterineyes Group Title
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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..

    • 2 years ago
  114. ashna Group Title
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    okay !

    • 2 years ago
  115. waterineyes Group Title
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    Can you tell me molecular mass of Water ??

    • 2 years ago
  116. ashna Group Title
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    i dont know !

    • 2 years ago
  117. waterineyes Group Title
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    \(H_2O = 2 \times 1 + 16 = 18 \)

    • 2 years ago
  118. ashna Group Title
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    oh okay !

    • 2 years ago
  119. waterineyes Group Title
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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 ?/

    • 2 years ago
  120. ashna Group Title
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    if this is called molecular mass.. then yes , some basics in my 8th !

    • 2 years ago
  121. ashna Group Title
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    am not sure with the names !

    • 2 years ago
  122. waterineyes Group Title
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    Remember : This is called Molecular Mass..

    • 2 years ago
  123. ashna Group Title
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    okay !

    • 2 years ago
  124. ashna Group Title
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    you ask me the molecular mass of something.. let me try !

    • 2 years ago
  125. waterineyes Group Title
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    Then Molar Mass is simple just very simple: Molar Mass = 18 grams..

    • 2 years ago
  126. ashna Group Title
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    oh .. just write it in terms of g ?

    • 2 years ago
  127. waterineyes Group Title
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    Find the molecular mass of Sodium Chloride (Salt). Do you know symbolically what is it ??

    • 2 years ago
  128. ashna Group Title
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    nacl ?

    • 2 years ago
  129. waterineyes Group Title
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    Yes can you find its molecular mass ?/

    • 2 years ago
  130. ashna Group Title
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    let me try !

    • 2 years ago
  131. waterineyes Group Title
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    I am attaching here some flash file hope you will like it..

    • 2 years ago
  132. ashna Group Title
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    atomic mass of Na is 23 atomic mass of Cl is 35.5 add them both ?

    • 2 years ago
  133. waterineyes Group Title
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    I will send you by other means it will take time to upload here.. Yes add them both..

    • 2 years ago
  134. ashna Group Title
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    okay !

    • 2 years ago
  135. ashna Group Title
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    58.5

    • 2 years ago
  136. ashna Group Title
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    molar mass 58.5g ?

    • 2 years ago
  137. waterineyes Group Title
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    yep..

    • 2 years ago
  138. ashna Group Title
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    :)

    • 2 years ago
  139. waterineyes Group Title
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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..

    • 2 years ago
  140. waterineyes Group Title
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    Wait. This has gone long. Start a new post..

    • 2 years ago
  141. ashna Group Title
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    okay :)

    • 2 years ago
  142. waterineyes Group Title
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    I mean to say that can we start a new post @ashna

    • 2 years ago
  143. ashna Group Title
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    yea okay !

    • 2 years ago
  144. waterineyes Group Title
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    Medal for finding molecular mass of NaCl..

    • 2 years ago
  145. ashna Group Title
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    lol .. thanks :)

    • 2 years ago
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spraguer (Moderator)
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