Question

Can anyone teach me mole concept .. please ?

Answer 1

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 ??

Answer 2

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 !

Answer 3

Ha ha ha..

I don't know nothing about it..

but don't worry I will give you what I know about this..

Answer 4

See, to measure any quantity you will need a suitable measure for it..

Right??

Answer 5

yes

Answer 6

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 ??

Answer 7

yea .. getting it :)

Answer 8

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 ??

Answer 9

yea got it !

Answer 10

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??

Answer 11

yea .. thanks water , you dont teach lyk how my teache did :D

Answer 12

Insulting me??

Ha ha ha..

Never mind..

Answer 13

Wanna proceed further ??

Answer 14

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

Answer 15

I was just kidding @ashna

Answer 16

:)

Answer 17

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 ??

Answer 18

*to count entities..

Answer 19

yea getting :)

Answer 20

So now we will define What Mole is..

Answer 21

okay !

Answer 22

This is the book definition of Mole..

you can check in your book..

Answer 23

one mole = 6.023 * 10^23 molecules ?

Answer 24

Yes but its the value..

I am talking about definition..

Answer 25

oh okay .. !

Answer 26

\(\color{blue}{\text{Mole}}:\)

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.

Answer 27

This is book definition..

I explain you best to my knowledge..

Answer 28

There \(C\) is Carbon..

Answer 29

okay !

Answer 30

@ashna , do you know for measuring any quantity we keep some standards for measuring any quantity..

Answer 31

like fore mass , kg ?

Answer 32

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..

Answer 33

yeah okay !

Answer 34

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 ??

Answer 35

yeah .. we will :P

Answer 36

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..

Answer 37

wow .. i understood :D

Answer 38

then .. ?

Answer 39

Okay..

Answer 40

Now we will find its value and define Avagadro's Number..

Heard the name ??

Answer 41

yeah !

Answer 42

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:

\[\large 1.992648 \times 10^{-23} \; g\]

Answer 43

Do you know the Atomic Mass of Carbon ??

Answer 44

oh .. never heard of that , ty :)

Answer 45

12 ?

Answer 46

Yep..

Answer 47

okay !

Answer 48

then ?

Answer 49

So we calculate the value of mole by using:

\[Number \; \; of \; \; Atoms = \frac{Mass}{Mass \; of \; One \; Atom}\]

Answer 50

You can say 1 Mole also in place of Number Of Atoms..

\[\large 1 \; Mole = \frac{12}{1.992648 \times 10^{-23}}\]

Answer 51

understood !

Answer 52

You can say 1 Mole also in place of Number Of Atoms..

\[\large 1 \; Mole = \frac{12}{1.992648 \times 10^{-23}}\]

\[\large 1 Mole = 6.023 \times 10^{23}\]

Answer 53

okay .. can you tell me the difference between mole and molecules ?

Answer 54

Mole is a measuring quantity..

Molecule is like formed by atoms..

\[O_2\]
this is molecule.

Answer 55

okay !

Answer 56

This is called Oxygen Molecule..

Answer 57

Actually mole will contains molecules.

Suppose 1 mole will contains 6.023*10^{23} molecules of Oxygen..

Answer 58

*will contain..

Answer 59

so you mean 1 C and 1 O contains same number of molecules ?
or is it the same for all elements ?

Answer 60

Just similar to :

1 Dozen will contain 12 Bananas.

1 Mole will contain 6.023*10^{23} molecules..

Answer 61

okay !

Answer 62

Yes coming to your question right now..

Answer 63

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..

Answer 64

okay :)

Answer 65

1 Mole of Hydrogen Atoms = \(6.023 \times 10^{23}\) hydrogen atoms.

1 Mole of Water Molecules = \(6.023 \times 10^{23}\) water molecules..

Answer 66

okay

Answer 67

1 Mole of Carbon Atoms = \(6.023 \times 10^{23}\) Carbon atoms.

1 Mole of Oxygen Atoms = \(6.023 \times 10^{23}\) Oxygen atoms..

Answer 68

yeah .. now i can understand :)

Answer 69

Coming to Avagadro's Number..

Answer 70

is that tough ?

Answer 71

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:

\[N_A = 6.023 \times 10^{23}\]

Answer 72

Is this tough??

Ha ha ha

Answer 73

why laughing ?

Answer 74

My habbit..

Answer 75

you got brains .. and my brains have just started developing .. that too after entering into open study !

Answer 76

No I did not mean that @ashna ..

Answer 77

i dont like chem , phy or math .. am only into literature !

Answer 78

oh god .. am not making you feel or anything .. am just talking naturally .. am sorry if you felt for it !

Answer 79

Literature??

Great..

Here Literature section is also there.

You can spend your time there also..

Answer 80

i know :)

Answer 81

Na means ?

Answer 82

It is denotion for Avagadro's constant..

Answer 83

I mean you can represent Avagadro's Number or constant as:

\[Avagadro's \; Constant = N_A = 1 Mole = 6.023 \times 10^{23}\]

Answer 84

okay .. and may i know if it is 10^22 or 10^23 or both ?

Answer 85

Not both:

only 23..

Answer 86

I am using 23 everywhere..

Answer 87

\[\huge 1 Mole = 6.023 \times 10^{23}\]

Answer 88

scroll up and see what you wrote for avagadros constant 1

Answer 89

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 ??

Answer 90

yea ..

Answer 91

is it 22 for avagadro's constant ?

Answer 92

Where I have written 22 then ??

Answer 93

No..

Answer 94

It has the same values as 1 Mole has...

Answer 95

*10^23 ? is what you have written ?

Answer 96

looks like 22 to me .. its okay , next week ll hav eye check up .. you continue :)

Answer 97

Yes..

Right click on that then select Show Math As and then text commands if you want to confirm..