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mayankdevnani Group Title

Can someone help me out. **BECOME FAN** **GIVE MEDALS** Q-) Can someone tell me briefly account on MOLES.

  • 2 years ago
  • 2 years ago

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  1. mayankdevnani Group Title
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    @.Sam. @phi @cwrw238 @radar @sara12345 @sauravshakya @surdawi @hba

    • 2 years ago
  2. mayankdevnani Group Title
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    @myko @amriju @Agent_Sniffles @mahmit2012 @him1618 @timo86m

    • 2 years ago
  3. mayankdevnani Group Title
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    plz help me

    • 2 years ago
  4. sara12345 Group Title
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    mole is just a counting number. like, dozen = 12, mole = some number

    • 2 years ago
  5. mayankdevnani Group Title
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    yaa then

    • 2 years ago
  6. mayankdevnani Group Title
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    like some examples

    • 2 years ago
  7. sara12345 Group Title
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    thats the concept. to count small particles in relation to mass, we use moles in chemistry

    • 2 years ago
  8. sara12345 Group Title
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    do u have any specific question

    • 2 years ago
  9. sara12345 Group Title
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    il have to think of an example...

    • 2 years ago
  10. mayankdevnani Group Title
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    no but i don't understand the formula of mole

    • 2 years ago
  11. sara12345 Group Title
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    forget about the formula. therez no formula. mole is not a theory. its just a number, so we use the number in conversions.

    • 2 years ago
  12. sara12345 Group Title
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    u wud be okay with mole, if u are familiar with dimensional analysis

    • 2 years ago
  13. mayankdevnani Group Title
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    nope

    • 2 years ago
  14. mayankdevnani Group Title
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    n(mole)=atomic weight/molar mass

    • 2 years ago
  15. sara12345 Group Title
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    ok do u knw below two things : 1) atomic mass 2) molar mass

    • 2 years ago
  16. mayankdevnani Group Title
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    yaa

    • 2 years ago
  17. sara12345 Group Title
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    could u tell me what they are

    • 2 years ago
  18. mayankdevnani Group Title
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    atomic mass means the atomic mass (ma) is the mass of a specific isotope, most often expressed in unified atomic mass units

    • 2 years ago
  19. mayankdevnani Group Title
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    the molar mass M is a physical property. It is defined as the mass of a given substance

    • 2 years ago
  20. mayankdevnani Group Title
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    right @sara12345

    • 2 years ago
  21. mayankdevnani Group Title
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    @sauravshakya

    • 2 years ago
  22. sara12345 Group Title
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    partially correct.

    • 2 years ago
  23. mayankdevnani Group Title
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    so whats that

    • 2 years ago
  24. sara12345 Group Title
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    in periodic table, the mass of each element is shown in unit amu, relative to carbon right ?

    • 2 years ago
  25. mayankdevnani Group Title
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    @sirm3d

    • 2 years ago
  26. mayankdevnani Group Title
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    right

    • 2 years ago
  27. sara12345 Group Title
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    |dw:1351767227333:dw|

    • 2 years ago
  28. sara12345 Group Title
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    N has a mass of 14 amu, Also, if u take one mole of N atoms, they would weigh 14 grams.

    • 2 years ago
  29. sara12345 Group Title
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    thats the relation between 'mole and grams'

    • 2 years ago
  30. mayankdevnani Group Title
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    yaa

    • 2 years ago
  31. mayankdevnani Group Title
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    ok then

    • 2 years ago
  32. myko Group Title
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    mol is just a number 6.02214179×10^23

    • 2 years ago
  33. mayankdevnani Group Title
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    ok

    • 2 years ago
  34. amriju Group Title
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    u need to know whats a mole rite....well...in a part of chemistry called physical chemistry...u need to calculate mass volume etc of chemical substances....for that....to measure the number of molecules atoms etc of the compound in a given sample...we use the term moles....it gives us the number of atoms or molecules..in the given amount of specimen....it accualy is 6.023* \[10^{23}\] units....just as a dozen means 12 units...so one mole of money means...6.023*10^23 rupess...

    • 2 years ago
  35. sara12345 Group Title
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    so u can use the ratio \(\frac{1 mol}{atomic\ mass}\) in your conversions

    • 2 years ago
  36. sara12345 Group Title
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    to converst between \(mol \) and \(grams\)

    • 2 years ago
  37. mayankdevnani Group Title
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    what is the formula of mole

    • 2 years ago
  38. sirm3d Group Title
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    a mole describes a fixed number of similar atoms or molecules a dozen means 12, a mole of nitrogen gas means 6.022x10^23 molecules of nitrogen gas

    • 2 years ago
  39. mayankdevnani Group Title
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    yaa i know but what's the formula of mole

    • 2 years ago
  40. sirm3d Group Title
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    1 mole = 6.022x10^23

    • 2 years ago
  41. amriju Group Title
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    now the mole is very special....since all that atomic weight u see is the weight of one mole of an atom in grams....same for moleclar wt.....also....for any gas..one mole of the gas occupies a volume of 22.4 litres at STP....so now u know that moles=Mass of the given specimen/ mol or atomic masss ( accordingly if its a molecule or an atom that the specimen is made of)

    • 2 years ago
  42. mayankdevnani Group Title
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    no how can we derive it

    • 2 years ago
  43. mayankdevnani Group Title
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    yaa thats what i have

    • 2 years ago
  44. mayankdevnani Group Title
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    @amriju can you give me examples of mole

    • 2 years ago
  45. sara12345 Group Title
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    lets work out the example/question u had asked before, whats that ?

    • 2 years ago
  46. amriju Group Title
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    lets say u have 200 grams of NaCl...can u find out the number of moles..?

    • 2 years ago
  47. sara12345 Group Title
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    lets not go to the compound level in the starting itself

    • 2 years ago
  48. sara12345 Group Title
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    lets take an example which involves element only

    • 2 years ago
  49. mayankdevnani Group Title
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    Na=23g and Cl=35.5g

    • 2 years ago
  50. amriju Group Title
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    correct.....so NaCl has a molecular mass of.?

    • 2 years ago
  51. sara12345 Group Title
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    ok great u seem to be having some idea of things already :)

    • 2 years ago
  52. mayankdevnani Group Title
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    200/58.5 moles

    • 2 years ago
  53. amriju Group Title
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    yooooooooooo

    • 2 years ago
  54. mayankdevnani Group Title
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    approx.

    • 2 years ago
  55. mayankdevnani Group Title
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    another some dificult

    • 2 years ago
  56. amriju Group Title
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    now find the number of moles of sodium ions in it....

    • 2 years ago
  57. mayankdevnani Group Title
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    not so much difficult

    • 2 years ago
  58. amriju Group Title
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    ok...so wats the answer..?

    • 2 years ago
  59. mayankdevnani Group Title
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    23 of \[Na^+\]

    • 2 years ago
  60. mayankdevnani Group Title
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    right?

    • 2 years ago
  61. amriju Group Title
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    number of moles of Na+

    • 2 years ago
  62. mayankdevnani Group Title
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    23g of Na+

    • 2 years ago
  63. amriju Group Title
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    thats the weight of Na+...i want the numbr of moles of it

    • 2 years ago
  64. mayankdevnani Group Title
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    sorry.. i don't know

    • 2 years ago
  65. sara12345 Group Title
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    did u get the question

    • 2 years ago
  66. sara12345 Group Title
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    question is this : find number of moles of Na+ in 2000 grams of NaCl

    • 2 years ago
  67. mayankdevnani Group Title
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    how can you identify question @sara12345

    • 2 years ago
  68. sirm3d Group Title
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    the number of moles of Na+ is the same as the number of moles of NaCl, which is 2000/58.5 moles

    • 2 years ago
  69. amriju Group Title
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    ok....u found the number of moles of nacl...k?..lets hav another ques...find the number of Na+ ions in a dozen of NaCl molecules

    • 2 years ago
  70. rduncan16 Group Title
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    did i barge in

    • 2 years ago
  71. amriju Group Title
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    @mayankdevnani answer my ques...

    • 2 years ago
  72. mayankdevnani Group Title
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    yaa you can @rduncan16

    • 2 years ago
  73. mayankdevnani Group Title
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    wait....

    • 2 years ago
  74. mayankdevnani Group Title
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    i don't get answer @amriju help me!!!!

    • 2 years ago
  75. rduncan16 Group Title
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    cuz i can give u the actuial formulia

    • 2 years ago
  76. mayankdevnani Group Title
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    yaa you can

    • 2 years ago
  77. amriju Group Title
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    how many Na+ atoms r there in 1 nacl molecule....nacl=na+ +cl-.....

    • 2 years ago
  78. mayankdevnani Group Title
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    so its 58.5g

    • 2 years ago
  79. mayankdevnani Group Title
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    @amriju @sara12345

    • 2 years ago
  80. mayankdevnani Group Title
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    @UnkleRhaukus

    • 2 years ago
  81. UnkleRhaukus Group Title
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    hmm, whats the question, something about a mole?

    • 2 years ago
  82. mayankdevnani Group Title
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    how many Na+ atoms r there in 1 nacl molecule

    • 2 years ago
  83. UnkleRhaukus Group Title
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    the NaCl molecule has one sodium atom and one chlorine atom only

    • 2 years ago
  84. mayankdevnani Group Title
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    yaa

    • 2 years ago
  85. mayankdevnani Group Title
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    then

    • 2 years ago
  86. UnkleRhaukus Group Title
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    one mole of NaCl has 6x10^23 molecules, so in one mole of NaCl there will be 6x10^23 sodiums and 6x10^23 chlorines

    • 2 years ago
  87. mayankdevnani Group Title
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    ok

    • 2 years ago
  88. UnkleRhaukus Group Title
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    easy ?

    • 2 years ago
  89. mayankdevnani Group Title
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    no so whats the answer

    • 2 years ago
  90. UnkleRhaukus Group Title
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    the H_2O molecule has two hydrogen atoms and one oxygen atom one mole of H_2O has 6x10^23 molecules, so in one mole of H_2O there will be 12x10^23 Hydrogens and 6x10^23 Oxygens

    • 2 years ago
  91. UnkleRhaukus Group Title
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    what was your question exactly?

    • 2 years ago
  92. mayankdevnani Group Title
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    how many Na+ atoms r there in 1 nacl molecule

    • 2 years ago
  93. UnkleRhaukus Group Title
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    one

    • 2 years ago
  94. sara12345 Group Title
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    friend, precicely this is the reason, i hinted u to take an example that contains only elements

    • 2 years ago
  95. sara12345 Group Title
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    when we are studying the concept of mole, it makes no sense to deal with compounds.

    • 2 years ago
  96. sara12345 Group Title
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    compounds wil come much later

    • 2 years ago
  97. UnkleRhaukus Group Title
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    ?

    • 2 years ago
  98. mayankdevnani Group Title
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    ok

    • 2 years ago
  99. sara12345 Group Title
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    this is the logical order we study things in chemistry : 1) atoms- models 2) compounds 3) reactions

    • 2 years ago
  100. sara12345 Group Title
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    mol concept is very basic, we learn it along with atomic mass and molar mass, in first module, atoms-models

    • 2 years ago
  101. sara12345 Group Title
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    once we get confident with atoms, mole conversions to grams and number of atoms, fully, we move to next module compounds.

    • 2 years ago
  102. mayankdevnani Group Title
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    sorry... meet tomorrow... thnx...for coming ....will be right back ...i tag you

    • 2 years ago
  103. sara12345 Group Title
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    NaCl is an ionic compound, which will not make sense to u, when we r living in module 1

    • 2 years ago
  104. mayankdevnani Group Title
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    ok @UnkleRhaukus @sara12345 @amriju @thivitaa

    • 2 years ago
  105. UnkleRhaukus Group Title
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    What

    • 2 years ago
  106. sara12345 Group Title
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    ok, mean while try to work this simple q : whats the mass of 2.35 moles of carbon ?

    • 2 years ago
  107. UnkleRhaukus Group Title
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    we know 12 g of carbon is a mole

    • 2 years ago
  108. sara12345 Group Title
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    you could use that

    • 2 years ago
  109. sara12345 Group Title
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    and another example : how many moles are in 100 grams of carbon ?

    • 2 years ago
  110. mayankdevnani Group Title
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    @amriju plz ask any question

    • 2 years ago
  111. mayankdevnani Group Title
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    plz @amriju for practise

    • 2 years ago
  112. amriju Group Title
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    i cant help u here...bring me ques..i can help...but i cant really form tough ques...:(

    • 2 years ago
  113. mayankdevnani Group Title
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    no... ask any question pklzz

    • 2 years ago
  114. mayankdevnani Group Title
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    @amriju

    • 2 years ago
  115. amriju Group Title
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    k....water was poured on sulphuric acid....making the temperature of the flask around 300 degrees and causing 25 percent of acid to vaporise...if the volume of the acid in gaseous state was x cc find 1) the number of moles of acid..2) total weight of the acid before water was poured

    • 2 years ago
  116. amriju Group Title
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    this is a pretty tough ques...

    • 2 years ago
  117. mayankdevnani Group Title
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    yaa well try this...isme kya bura hai

    • 2 years ago
  118. amriju Group Title
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    tumne charles nd boyles law kr liye ho..?

    • 2 years ago
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