Mole Concept

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Do you know how much is 1 mole? Mole Concept is explained in terms of mass, count of particles and volume of a gas.
Avogadro's Number also known as Avogadro's Constant is also explained. Mole is a very important unit in Chemistry.
Solutions of Top 3 Questions on Mole Concept: COMING SOON !!
The questions are shown at the end of the video.

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For LIVE Classes, Concept Videos, Quizzes, Mock Tests & Revision Notes please see our Website/App 👇

ManochaAcademy
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Answers:
Q1. Molecular Formula of Ammonium Carbonate => (NH₄)₂CO₃
N₂ → 14 × 2 = 28
2H₄ → 1 × 2 × 4 = 8
C → 12
O₃ → 16 × 3 = 48
---> 28 + 8 + 12 + 48 = 96
Therefore, Molar Mass of Ammonium Carbonate is equal to 96 units and it's expressed as 96g/mol


Q2. Molecular Nitrogen consists of 2 Nitrogen Atoms and is denoted as N₂
Molecular Mass → 28
Molar mass of nitrogen gas → 28g/mol
We know, that per mole of nitrogen gas, there are 28 grams of it.
So, let the number of moles be x
28x = 140
x = 140/28 = 5
Thus, there are 5 moles in 140g of Nitrogen Gas

STP is Standard Temperature and Pressure.
According to IUPAC Definition, (Which is usually used by chemists) STP is 273.15K and 10⁵ Pa.
Volume of any gas at STP is 22.4L ( Standard Molar Volume )
Thus, Nitrogen's volume at STP is 22.4L


Q3. The molecular weight of water is 18 g/mol.
Hence, one mole of water weighs 18 g.
One mole of water contains 6.023×10^23 (Avogadro's Constant) water molecules.
Mass of one water molecule =
18/(6.023×10^23)
2.988 × 10^-23 g
Since this is in C.G.S. unit, we need to convert it into S.I. unit
S.I. unit of mass is Kg
2.988 × 10^-23 g ==> 2.988 × 10^-26 kg [ SINCE 1 x 10^0 g = 1 x 10^-3 kg ]
2.988 × 10^-26 kg ==> Answer.

aahankumar
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Finally after many years I got cleared on the mole concept... Thanks a lot

PremKumar-eidm
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...people was very confused when I started to buy stuffs in moles, man you're a master of chemistry🤜🤛

maxwell
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if teachers taught us like that, I would have been so interested in studies

samarmalhotra
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Amazing, i really understood this concept, with which i ws messed up since 2 days

shivajihake
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The production quality of the video and the fluency in communication is outstanding...

fiercetroopergaming
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Out standing sir, first time i understand the concept of mole realy

ibrahimkhan-lnqc
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1.ammonium carbonate = (NH⁴)2co³
= 2(14+4(1)+12+3(16)
= 2(18)+60
= 96g

2. N²
= 2(14)
=140g/28=5
#5
and 5×22.4l
= 112.0l



3. 18/6.022×10²³
=2.989×10-²³

nnharshini
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Im a house wife of 47 years. I did chem hons . I forgot many things in chmistry. I subscribed ur channel to learn chem again. Thanx for explainig in such a good way

sumonachakraborty
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U deserve Nobel prize because explanation as u ...never before ever after

Trendsofcricket
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I have always had a doubt in mole concept. I have watched tons of videos to clear my problems but none of them helped until I came across this video. Thank you so much for clearing my doubts. When I first came across this topic, my mind was deluded in confusion. Most of the teachers offline or online blindly just state the avagadro's number and tell us to remember it. But this is the first time I came across someone who practically showed us how and why it is the way it is. On behalf of all students, we are really thankful for the all the contents you come up with.

ccred-zkzn
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1) 96 g
2) => Number of moles in 140 g of N2 is 5 moles & volume is 112 L
3) 18 g ❤

rithizx
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My teacher share this video in group and ask students to watch this video😂🤣😂

crazygamingyr
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Sir you are really India's top 1 teacher
🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
Guru ji your teaching methods is very nice

ShivamSingh-oohx
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Couldn't understand the concept of moles properly at first, but thanks to you, I now understand it better! Thank you! Please keep up the great work.

Nino-eoey
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Tomorrow is my physics exam and I dont know what to do, and i searched your channel and read the mole concept ! Now I understood ! thank you so much sir !

blossomwings
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Sir tomorrow is my exam and I searched video regarding this and u came I subscribed your channel Best teaching sir👍👌

DevilOfDemisek
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Sir, you use simple English language, and teach peacefully, so we can easily understand Thank you ☺️

sulbhagholap
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MOLE CONCEPT....

SIR,

YOU EXPLAIN MANY COMPLEX THINGS IN A SIMPE WAY TO MAKE UNDERSTAND THE CONCEPT.

AMONGST ALL, THIS VIDEO STANDS IN THE FOREFRONT.

NO DOUBT YOU HAVE A KNACK OR SPECIAL QUALITY FOR TEACHING.

IN MY OPINION, THIS VIDEO IS OUTSTANDING IN EXPLAINING THE CONCEPT AND A WORLD CLASS ONE WORTH PRESERVING FOR DEMONSTRATION IN ALL SCHOOLS AND COLLEGES.

AS PER MY EXPERIENCE MANY BOOKS AND TEACHERS/LECTURERS HAVE MISERABLY FAILED IN THE PAST AND PRESENT TO EXPLAIN THE CONCEPT.

VIDEO VERY WELL PLANNED AND EXECUTED.

Vatsa BANGALORE

srivatsaa.r.