Mole Concept

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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[@aahankumar2567]

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. __________________________________________________________________________________________

[@ItzDevil-nk3ry]

At 2 ans volume must be 5 times 22.4 litres = 112 litres. Btw thanks for helping me out in other answers.

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[@PremKumar-ei4dm]

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

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

[@ManochaAcademy]

Great to hear that the concept is clear to you :) Thanks!! To revise the concepts, try the Quiz and Top 3 Questions for this video here: www.manochaacademy.com/chemistry/mole-concept/l/mole-concept

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[@rithizx]

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

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Bro agr appko nhi aata to glt kyu bta rhe hoo Sir ne volume of gas puchi thi or gas N² hoti na ki N😅😅😅

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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.

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[@nnharshini9294]

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

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sir before watching your this video of mole concept I watched many video but I unable to understood any of those and at last I watched your video and now my mole concept is clear. So thnx at lot sir....

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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

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[@ankitaghoshchowdhury7615]

Answers 1) 96 grams 2)i) 5 moles ii) 112 litres 3) 0.018 kg Thanks alot sir😄😊

[@arjoona3711]

could u explain this?

[@nathanjohn2572]

Unfortunately you are wrong.The answer to question 3 is 2.99 × 10 ^-23 grams.It is the molar mass of H2O divided by Avogadros constant.

[@falco2296]

@@nathanjohn2572 you could just do the molecular mass number as the mass of 1 mole of water

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@@falco2296 No,if you what the video it is infact 1 molecule of water not one mole of water.

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I was lacking behind my class because I didn't understand my teacher explanation but now my mole concept is crystal clear tysm sir .

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Thank you very much for this wonderful video sir. Had difficulty understanding this concept, it’s all clear now.

[@venkat4751]

1. 96g 2. 5moles and 112 litres 3. 3 X 10^-26kgs (I took Approximate value of Avagdro number to 6X10^-23

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10^-23 is wrong bro

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hi thanks for the beautiful video ...clear all...i have two questions: 1.how Avogadro came to know that it is exactly 6.022*10^23 particles ? how he measured ? 2.why temperature is considered 0 deg Celsius in STP ? why not - 5 or room temperature ?

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Now the concept of mole is totally clear.....😊......Thank you so much dear sir.....💙

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[@ManochaAcademy]

Most welcome

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1. 96g 2. (i) 10 moles (ii) 224 litres 3. 18g Thank you for the wonderful session sir

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2 (i) 5mol and (ii) 112litres because nitrogen=N2

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3 is wrong it is 0.31* 10^-23 as mass of 1 molecule is asked not 1 mole

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😢

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​@@charanpreetreddy9250 it's actually 3x10-²³

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Most welcome

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3rd answer is 2.98×10power -23

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Thanks

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1.......138. 2.......10mol....224 litres 3........0.018 kg

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1st answer is not 138 its 96....

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Thanks a ton

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Most Welcome

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I don't know whether there is a better way of explaining this topic.. Thank you sir

[@ManochaAcademy]

Happy to help