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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.

  • one year ago
  • one year ago

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

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

    • one year ago
  3. mayankdevnani Group Title
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    plz help me

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

    • one year ago
  5. mayankdevnani Group Title
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    yaa then

    • one year ago
  6. mayankdevnani Group Title
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    like some examples

    • one year 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

    • one year ago
  8. sara12345 Group Title
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    do u have any specific question

    • one year ago
  9. sara12345 Group Title
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    il have to think of an example...

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

    • one year 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.

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

    • one year ago
  13. mayankdevnani Group Title
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    nope

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

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

    • one year ago
  16. mayankdevnani Group Title
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    yaa

    • one year ago
  17. sara12345 Group Title
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    could u tell me what they are

    • one year 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

    • one year 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

    • one year ago
  20. mayankdevnani Group Title
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    right @sara12345

    • one year ago
  21. mayankdevnani Group Title
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    @sauravshakya

    • one year ago
  22. sara12345 Group Title
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    partially correct.

    • one year ago
  23. mayankdevnani Group Title
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    so whats that

    • one year 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 ?

    • one year ago
  25. mayankdevnani Group Title
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    @sirm3d

    • one year ago
  26. mayankdevnani Group Title
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    right

    • one year ago
  27. sara12345 Group Title
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    |dw:1351767227333:dw|

    • one year 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.

    • one year ago
  29. sara12345 Group Title
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    thats the relation between 'mole and grams'

    • one year ago
  30. mayankdevnani Group Title
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    yaa

    • one year ago
  31. mayankdevnani Group Title
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    ok then

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

    • one year ago
  33. mayankdevnani Group Title
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    ok

    • one year 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...

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

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

    • one year ago
  37. mayankdevnani Group Title
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    what is the formula of mole

    • one year 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

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

    • one year ago
  40. sirm3d Group Title
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    1 mole = 6.022x10^23

    • one year 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)

    • one year ago
  42. mayankdevnani Group Title
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    no how can we derive it

    • one year ago
  43. mayankdevnani Group Title
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    yaa thats what i have

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

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

    • one year 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..?

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

    • one year ago
  48. sara12345 Group Title
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    lets take an example which involves element only

    • one year ago
  49. mayankdevnani Group Title
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    Na=23g and Cl=35.5g

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

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

    • one year ago
  52. mayankdevnani Group Title
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    200/58.5 moles

    • one year ago
  53. amriju Group Title
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    yooooooooooo

    • one year ago
  54. mayankdevnani Group Title
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    approx.

    • one year ago
  55. mayankdevnani Group Title
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    another some dificult

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

    • one year ago
  57. mayankdevnani Group Title
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    not so much difficult

    • one year ago
  58. amriju Group Title
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    ok...so wats the answer..?

    • one year ago
  59. mayankdevnani Group Title
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    23 of \[Na^+\]

    • one year ago
  60. mayankdevnani Group Title
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    right?

    • one year ago
  61. amriju Group Title
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    number of moles of Na+

    • one year ago
  62. mayankdevnani Group Title
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    23g of Na+

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

    • one year ago
  64. mayankdevnani Group Title
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    sorry.. i don't know

    • one year ago
  65. sara12345 Group Title
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    did u get the question

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

    • one year ago
  67. mayankdevnani Group Title
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    how can you identify question @sara12345

    • one year 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

    • one year 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

    • one year ago
  70. rduncan16 Group Title
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    did i barge in

    • one year ago
  71. amriju Group Title
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    @mayankdevnani answer my ques...

    • one year ago
  72. mayankdevnani Group Title
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    yaa you can @rduncan16

    • one year ago
  73. mayankdevnani Group Title
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    wait....

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

    • one year ago
  75. rduncan16 Group Title
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    cuz i can give u the actuial formulia

    • one year ago
  76. mayankdevnani Group Title
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    yaa you can

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

    • one year ago
  78. mayankdevnani Group Title
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    so its 58.5g

    • one year ago
  79. mayankdevnani Group Title
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    @amriju @sara12345

    • one year ago
  80. mayankdevnani Group Title
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    @UnkleRhaukus

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

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

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

    • one year ago
  84. mayankdevnani Group Title
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    yaa

    • one year ago
  85. mayankdevnani Group Title
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    then

    • one year 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

    • one year ago
  87. mayankdevnani Group Title
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    ok

    • one year ago
  88. UnkleRhaukus Group Title
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    easy ?

    • one year ago
  89. mayankdevnani Group Title
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    no so whats the answer

    • one year 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

    • one year ago
  91. UnkleRhaukus Group Title
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    what was your question exactly?

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

    • one year ago
  93. UnkleRhaukus Group Title
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    one

    • one year 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

    • one year 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.

    • one year ago
  96. sara12345 Group Title
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    compounds wil come much later

    • one year ago
  97. UnkleRhaukus Group Title
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    ?

    • one year ago
  98. mayankdevnani Group Title
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    ok

    • one year 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

    • one year 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

    • one year 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.

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

    • one year 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

    • one year ago
  104. mayankdevnani Group Title
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    ok @UnkleRhaukus @sara12345 @amriju @thivitaa

    • one year ago
  105. UnkleRhaukus Group Title
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    What

    • one year 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 ?

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

    • one year ago
  108. sara12345 Group Title
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    you could use that

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

    • one year ago
  110. mayankdevnani Group Title
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    @amriju plz ask any question

    • one year ago
  111. mayankdevnani Group Title
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    plz @amriju for practise

    • one year 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...:(

    • one year ago
  113. mayankdevnani Group Title
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    no... ask any question pklzz

    • one year ago
  114. mayankdevnani Group Title
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    @amriju

    • one year 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

    • one year ago
  116. amriju Group Title
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    this is a pretty tough ques...

    • one year ago
  117. mayankdevnani Group Title
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    yaa well try this...isme kya bura hai

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

    • one year ago
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