anonymous
  • anonymous
Can anyone teach me mole concept .. please ?
Chemistry
  • Stacey Warren - Expert brainly.com
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schrodinger
  • schrodinger
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anonymous
  • anonymous
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 ??
anonymous
  • anonymous
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 !
anonymous
  • anonymous
Ha ha ha.. I don't know nothing about it.. but don't worry I will give you what I know about this..

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anonymous
  • anonymous
See, to measure any quantity you will need a suitable measure for it.. Right??
anonymous
  • anonymous
yes
anonymous
  • anonymous
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 ??
anonymous
  • anonymous
yea .. getting it :)
anonymous
  • anonymous
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 ??
anonymous
  • anonymous
yea got it !
anonymous
  • anonymous
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??
anonymous
  • anonymous
yea .. thanks water , you dont teach lyk how my teache did :D
anonymous
  • anonymous
Insulting me?? Ha ha ha.. Never mind..
anonymous
  • anonymous
Wanna proceed further ??
anonymous
  • anonymous
hey am nt insulting ,i meant to say you were teaching very wel and nothing like how my teacher did .. of course .. please proceed !
anonymous
  • anonymous
I was just kidding @ashna
anonymous
  • anonymous
:)
anonymous
  • anonymous
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 ??
anonymous
  • anonymous
*to count entities..
anonymous
  • anonymous
yea getting :)
anonymous
  • anonymous
So now we will define What Mole is..
anonymous
  • anonymous
okay !
anonymous
  • anonymous
This is the book definition of Mole.. you can check in your book..
anonymous
  • anonymous
one mole = 6.023 * 10^23 molecules ?
anonymous
  • anonymous
Yes but its the value.. I am talking about definition..
anonymous
  • anonymous
oh okay .. !
anonymous
  • anonymous
\(\color{blue}{\text{Mole}}:\) 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.
anonymous
  • anonymous
This is book definition.. I explain you best to my knowledge..
anonymous
  • anonymous
There \(C\) is Carbon..
anonymous
  • anonymous
okay !
anonymous
  • anonymous
@ashna , do you know for measuring any quantity we keep some standards for measuring any quantity..
anonymous
  • anonymous
like fore mass , kg ?
anonymous
  • anonymous
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..
anonymous
  • anonymous
yeah okay !
anonymous
  • anonymous
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 ??
anonymous
  • anonymous
yeah .. we will :P
anonymous
  • anonymous
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..
anonymous
  • anonymous
wow .. i understood :D
anonymous
  • anonymous
then .. ?
anonymous
  • anonymous
Okay..
anonymous
  • anonymous
Now we will find its value and define Avagadro's Number.. Heard the name ??
anonymous
  • anonymous
yeah !
anonymous
  • anonymous
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: \[\large 1.992648 \times 10^{-23} \; g\]
anonymous
  • anonymous
Do you know the Atomic Mass of Carbon ??
anonymous
  • anonymous
oh .. never heard of that , ty :)
anonymous
  • anonymous
12 ?
anonymous
  • anonymous
Yep..
anonymous
  • anonymous
okay !
anonymous
  • anonymous
then ?
anonymous
  • anonymous
So we calculate the value of mole by using: \[Number \; \; of \; \; Atoms = \frac{Mass}{Mass \; of \; One \; Atom}\]
anonymous
  • anonymous
You can say 1 Mole also in place of Number Of Atoms.. \[\large 1 \; Mole = \frac{12}{1.992648 \times 10^{-23}}\]
anonymous
  • anonymous
understood !
anonymous
  • anonymous
You can say 1 Mole also in place of Number Of Atoms.. \[\large 1 \; Mole = \frac{12}{1.992648 \times 10^{-23}}\] \[\large 1 Mole = 6.023 \times 10^{23}\]
anonymous
  • anonymous
okay .. can you tell me the difference between mole and molecules ?
anonymous
  • anonymous
Mole is a measuring quantity.. Molecule is like formed by atoms.. \[O_2\] this is molecule.
anonymous
  • anonymous
okay !
anonymous
  • anonymous
This is called Oxygen Molecule..
anonymous
  • anonymous
Actually mole will contains molecules. Suppose 1 mole will contains 6.023*10^{23} molecules of Oxygen..
anonymous
  • anonymous
*will contain..
anonymous
  • anonymous
so you mean 1 C and 1 O contains same number of molecules ? or is it the same for all elements ?
anonymous
  • anonymous
Just similar to : 1 Dozen will contain 12 Bananas. 1 Mole will contain 6.023*10^{23} molecules..
anonymous
  • anonymous
okay !
anonymous
  • anonymous
Yes coming to your question right now..
anonymous
  • anonymous
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..
anonymous
  • anonymous
okay :)
anonymous
  • anonymous
1 Mole of Hydrogen Atoms = \(6.023 \times 10^{23}\) hydrogen atoms. 1 Mole of Water Molecules = \(6.023 \times 10^{23}\) water molecules..
anonymous
  • anonymous
okay
anonymous
  • anonymous
1 Mole of Carbon Atoms = \(6.023 \times 10^{23}\) Carbon atoms. 1 Mole of Oxygen Atoms = \(6.023 \times 10^{23}\) Oxygen atoms..
anonymous
  • anonymous
yeah .. now i can understand :)
anonymous
  • anonymous
Coming to Avagadro's Number..
anonymous
  • anonymous
is that tough ?
anonymous
  • anonymous
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: \[N_A = 6.023 \times 10^{23}\]
anonymous
  • anonymous
Is this tough?? Ha ha ha
anonymous
  • anonymous
why laughing ?
anonymous
  • anonymous
My habbit..
anonymous
  • anonymous
you got brains .. and my brains have just started developing .. that too after entering into open study !
anonymous
  • anonymous
No I did not mean that @ashna ..
anonymous
  • anonymous
i dont like chem , phy or math .. am only into literature !
anonymous
  • anonymous
oh god .. am not making you feel or anything .. am just talking naturally .. am sorry if you felt for it !
anonymous
  • anonymous
Literature?? Great.. Here Literature section is also there. You can spend your time there also..
anonymous
  • anonymous
i know :)
anonymous
  • anonymous
Na means ?
anonymous
  • anonymous
It is denotion for Avagadro's constant..
anonymous
  • anonymous
I mean you can represent Avagadro's Number or constant as: \[Avagadro's \; Constant = N_A = 1 Mole = 6.023 \times 10^{23}\]
anonymous
  • anonymous
okay .. and may i know if it is 10^22 or 10^23 or both ?
anonymous
  • anonymous
Not both: only 23..
anonymous
  • anonymous
I am using 23 everywhere..
anonymous
  • anonymous
\[\huge 1 Mole = 6.023 \times 10^{23}\]
anonymous
  • anonymous
scroll up and see what you wrote for avagadros constant 1
anonymous
  • anonymous
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 ??
anonymous
  • anonymous
yea ..
anonymous
  • anonymous
is it 22 for avagadro's constant ?
anonymous
  • anonymous
Where I have written 22 then ??
anonymous
  • anonymous
No..
anonymous
  • anonymous
It has the same values as 1 Mole has...
anonymous
  • anonymous
*10^23 ? is what you have written ?
anonymous
  • anonymous
looks like 22 to me .. its okay , next week ll hav eye check up .. you continue :)
anonymous
  • anonymous
Yes.. Right click on that then select Show Math As and then text commands if you want to confirm..
anonymous
  • anonymous
its okay .. i trust you ;)
anonymous
  • anonymous
What I can explain more in this ?
anonymous
  • anonymous
Do you know about Molar Mass ??
anonymous
  • anonymous
teach me how to do the sums !
anonymous
  • anonymous
Ha ha ha... My weakest part..
anonymous
  • anonymous
Do you know what is molar mass ??
anonymous
  • anonymous
what is molar mass .. ?
anonymous
  • anonymous
some problem with my net connection .. that's why i seemed offline sorry !
anonymous
  • anonymous
am sorry again !
anonymous
  • anonymous
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..
anonymous
  • anonymous
And we have other members too so don't worry we are on safe side..
anonymous
  • anonymous
okay .. but i prefer you .. u've been the one who has been helping me from the begining in OS !
anonymous
  • anonymous
what is molar mass ?
anonymous
  • anonymous
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..
anonymous
  • anonymous
okay .. partly understood .. examples in stock ?
anonymous
  • anonymous
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..
anonymous
  • anonymous
okay !
anonymous
  • anonymous
Can you tell me molecular mass of Water ??
anonymous
  • anonymous
i dont know !
anonymous
  • anonymous
\(H_2O = 2 \times 1 + 16 = 18 \)
anonymous
  • anonymous
oh okay !
anonymous
  • anonymous
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 ?/
anonymous
  • anonymous
if this is called molecular mass.. then yes , some basics in my 8th !
anonymous
  • anonymous
am not sure with the names !
anonymous
  • anonymous
Remember : This is called Molecular Mass..
anonymous
  • anonymous
okay !
anonymous
  • anonymous
you ask me the molecular mass of something.. let me try !
anonymous
  • anonymous
Then Molar Mass is simple just very simple: Molar Mass = 18 grams..
anonymous
  • anonymous
oh .. just write it in terms of g ?
anonymous
  • anonymous
Find the molecular mass of Sodium Chloride (Salt). Do you know symbolically what is it ??
anonymous
  • anonymous
nacl ?
anonymous
  • anonymous
Yes can you find its molecular mass ?/
anonymous
  • anonymous
let me try !
anonymous
  • anonymous
I am attaching here some flash file hope you will like it..
anonymous
  • anonymous
atomic mass of Na is 23 atomic mass of Cl is 35.5 add them both ?
anonymous
  • anonymous
I will send you by other means it will take time to upload here.. Yes add them both..
anonymous
  • anonymous
okay !
anonymous
  • anonymous
58.5
anonymous
  • anonymous
molar mass 58.5g ?
anonymous
  • anonymous
yep..
anonymous
  • anonymous
:)
anonymous
  • anonymous
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..
anonymous
  • anonymous
Wait. This has gone long. Start a new post..
anonymous
  • anonymous
okay :)
anonymous
  • anonymous
I mean to say that can we start a new post @ashna
anonymous
  • anonymous
yea okay !
anonymous
  • anonymous
Medal for finding molecular mass of NaCl..
anonymous
  • anonymous
lol .. thanks :)

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