Molecular Orbital Theory | MO Diagrams for Diatomic Molecules | CSIR NET | GATE | IIT JAM | DU | BHU

  Рет қаралды 64,600

VedPrep Chem Academy

VedPrep Chem Academy

Күн бұрын

Пікірлер: 118
@VedPrepChemAcademy
@VedPrepChemAcademy 7 ай бұрын
💁🏻‍♂ 𝗗𝗼𝘄𝗻𝗹𝗼𝗮𝗱 𝟭𝟬 𝐩𝐫𝐞𝐯𝐢𝐨𝐮𝐬 𝐲𝐞𝐚𝐫 𝐐𝐮𝐞𝐬𝐭𝐢𝐨𝐧 𝐏𝐚𝐩𝐞𝐫 𝐰𝐢𝐭𝐡 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧 | 𝗖𝗦𝗜𝗥-𝗡𝗘𝗧 | 𝗜𝗜𝗧 𝗝𝗔𝗠 | 𝗚𝗔𝗧𝗘👉 vedprep.com/pyq
@hiranyadissanayake9045
@hiranyadissanayake9045 4 жыл бұрын
Sir im from sri lanka..thankfully i understand hindi so i watch ur lectures..U are an excellent teacher!! Thank you so much 🙏🙏🙏🙏
@mr.shubhamroy3784
@mr.shubhamroy3784 4 жыл бұрын
Sir regarding colour appearance of Fl2, Cl2, Br2, I2 --- energy gap is calculated between atomic orbitals S and p.. But colour is due to electronic transition b/w molecular orbitals. So how S-P mixing(Atomic orbital property) can be correlated with colours(molecular orbital properly) ..video start from 1:46:30 and 35:00 Pls sir next video me isko Thora repeat kar dijiye. ❤️ 🙏🙏🙏🙏
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Wait for transition and colour lecture
@kimjongun1551
@kimjongun1551 4 жыл бұрын
Firstly we pray for your good health and may God always cherish you with all his blessings 🙏🙏🙏🙏🙏Respected Ved Sir kindly start reaction mechanism in coordination🙏🙏🙏We all again thank you for your amazing lectures.... We all humbly request to kindly complete reagents and coordination. We hope that chem academy and Sri ved sir will submit our request 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
@seemajangir6866
@seemajangir6866 4 жыл бұрын
one of the best chemistry teacher 😊 sir your way of teaching is understanding and easy ... thanks for giving your knowledge and valuable time
@s.k.pratibha7700
@s.k.pratibha7700 4 жыл бұрын
I am very grateful to you and your efforts for us sir. Feeling lucky to have u as our master sir😊
@ravinderkaur2433
@ravinderkaur2433 4 жыл бұрын
Bhout wdiya ji...very nice..thanks a lot sir.. shukriya...my.first chemistry teacher look like ved sir....onna ne basic bhout wdiya clear kite c..and this teacher teaches very deeply....or chemistry phle se hi favorite thi...abb sirra!!!
@kkahas
@kkahas 2 жыл бұрын
Thank you sir for your wonderful lecture. I am preparing for UPSC with Chemistry OPTIONAL and your video is too much helpful for me. That's I suggest to my friend and my sister to study Chemistry from you. Because after Studying from you I stop rote learning and Understand Chemistry First Time in my life even I got 93 marks in 12th but never Understand Chemistry but today I understand each and every concept and credit goes to you sir . Thank you Sir 🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏
@diamondknowledgekingdom6032
@diamondknowledgekingdom6032 4 жыл бұрын
Happpy teacher day to all chem academy teacher....god bless u sir & ma'am....with all happiness🙏
@priyalmittal2301
@priyalmittal2301 3 жыл бұрын
I have one question kindly solve my query.. on going left to right in periodic table gap between 2p and 2s how can decrease? While no. Of shell is constant even no. Of proton is increased so attraction of nucleus is increase as a result gap should be decreased but here is reverse ? Why sir please sir give ans.
@ganeshgaur2002
@ganeshgaur2002 3 жыл бұрын
Sir have told this in his chemical bonding lectures .. it occurs bcz, since 2s is more close to nucleus thats why it gets attracted and gets more close to nucleus bcz of increased protons and at the same time since electrons are being added which cause electronic replusion to some extent which then widens gap between 2s and 2p.
@killer24king43
@killer24king43 Ай бұрын
Bahut achhe se samajhate h aap sir🙏🏼
@VedPrepChemAcademy
@VedPrepChemAcademy Ай бұрын
Thank you & Most Welcome! 👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@souvikghosh7820
@souvikghosh7820 4 жыл бұрын
The great teacher Forever in chemistry
@souvikghosh7820
@souvikghosh7820 4 жыл бұрын
@@VedPrepChemAcademy Sir what is the exam date of tifr GS 2022
@souvikghosh7820
@souvikghosh7820 4 жыл бұрын
@@VedPrepChemAcademy Sir FOR TIFR GS 2022 CAN CHEM ACADEMY START ANY BATCH
@shubhamjangirchemistry7624
@shubhamjangirchemistry7624 4 жыл бұрын
Sir tbiyat ka dhyan rkhe...All is well...we are with u sir.. Thanku for another masterclass lecture...🙏🙏🙏🙏🙏
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Dhanyevad , share with your friends
@diona6644
@diona6644 4 жыл бұрын
Your teaching is always perfect
@The_Study_Centre_108
@The_Study_Centre_108 3 жыл бұрын
You are chem affiniter(जो रसायनशास्त्र के प्रति affinity बढ़ाता है) Sir...🙏
@abcdef-eg8bx
@abcdef-eg8bx 4 жыл бұрын
Best chemistry teacher 1🙏🙏
@augustus4682
@augustus4682 3 жыл бұрын
This guy is legend 🙏🙏
@gitamahato6660
@gitamahato6660 4 жыл бұрын
Sir you are God of chemistry
@p.k._1211
@p.k._1211 Жыл бұрын
आपके पढ़ाने के तरीके से लगता है आप विद्वान है chemistry के 🙏🙏
@VedPrepChemAcademy
@VedPrepChemAcademy Жыл бұрын
👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@treacherous_terrain
@treacherous_terrain 4 жыл бұрын
your lectures are always amazing :)
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Thanks share with your friends
@subhalaxmibehera7015
@subhalaxmibehera7015 4 жыл бұрын
Sir app such me alag ho👏💞💝
@khurshidahmad2827
@khurshidahmad2827 4 жыл бұрын
Sir 3 classes ho gai nd abi 11 type ki MO rehti hain kiya agli 3 classes main ho jaen gi sari ki sari with detail
@dileepkumarojha3900
@dileepkumarojha3900 4 жыл бұрын
Thank u so much sir Behtareen 😊😊🙏😍
@DHYAN76900
@DHYAN76900 2 жыл бұрын
You absolutely rockstar sir ji 🙏
@banbarilalmorya3766
@banbarilalmorya3766 10 ай бұрын
❤❤❤❤❤guru g ke charad spers
@VedPrepChemAcademy
@VedPrepChemAcademy 10 ай бұрын
👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@madhusmitasahoo5555
@madhusmitasahoo5555 4 жыл бұрын
What a amezing lecture.log jaise movie dekhte wakt usme kho jate hain mein bhi jab ved sir ke lecture ko dekhti hu mujhe aisa lagta hai ki bas lecture chalta jae aur mein dekhti jau.aur kya hi bolu.ek request hai chem academy ki team se ki bahut din ho gaye hain par abhi tak you tube pe live wala peoblem solve nahi hua hai.kab se ved sir ki class ko miss kar rhi hun.plzzz zaldi se phir se class start kijie.thermo khatam kar dijie.plzzz humble request from a big fam of ved sir and also fan of chem academy
@puspanjalisahoo4285
@puspanjalisahoo4285 4 жыл бұрын
Right.plzz sir you tube mein jo adhura chapter hai use khatam kar dijie.plzz kab se class nhi hua hai.ved sir ke thermo ko bahut miss kar rhe hai hum😭😭😭😭🥺🥺
@madhusmitasahoo5555
@madhusmitasahoo5555 4 жыл бұрын
@@VedPrepChemAcademyok sir😊😊
@RAHULYADAV-no7rx
@RAHULYADAV-no7rx 4 жыл бұрын
bhut bhut sukriyea sir bhut take care of your health 🙏❤💓
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Welcome share with your friends.
@anamikavishwakarma7370
@anamikavishwakarma7370 9 ай бұрын
❤❤❤❤❤ thank you sir for your valuable time
@VedPrepChemAcademy
@VedPrepChemAcademy 9 ай бұрын
Most Welcome! 👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@jagjeetgujral4313
@jagjeetgujral4313 Жыл бұрын
which books to refer for sp mixing concept?
@killer24king43
@killer24king43 Ай бұрын
Thankyou sir🙏🏼
@VedPrepChemAcademy
@VedPrepChemAcademy Ай бұрын
Most Welcome! 👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@PriyaYadav-oy4mr
@PriyaYadav-oy4mr 3 жыл бұрын
Thank you so much sir. 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻
@raveenarawat4692
@raveenarawat4692 4 жыл бұрын
Nice sir 👌👌 Sir IIT jam ke liye inorganic aur physical ke liye konsi best books rahegi please sir bta dijiye bhahut problem ho rhi hai
@ayeshatabrez-wo8fi
@ayeshatabrez-wo8fi 29 күн бұрын
Is it beneficial to watch these lectures now as i am having problems in mot and there is only 1 month left for exam ihave prepred nothing
@VedPrepChemAcademy
@VedPrepChemAcademy 28 күн бұрын
Yes, absolutely! With only a month left for the exam, watching these lectures is a great decision. 🟨 𝗩𝗲𝗱 𝗦𝗶𝗿'𝘀 𝗟𝗲𝗮𝗿𝗻𝗶𝗻𝗴 𝗖𝗼𝘂𝗿𝘀𝗲 | 𝗥𝗲𝗴𝗶𝘀𝘁𝗲𝗿 𝗵𝗲𝗿𝗲👉 bit.ly/4gmL7Ct 💁‍♂ Register here | CSIR NET Dec 2024 | NET Premiere League (NPL)👉 bit.ly/csirnetdec2024NPLbyVedSir 💁‍♂ Register here | IIT JAM 2025 | JAM Premiere League (JPL)👉 bit.ly/iitjam2025jpl 💁‍ Register here | CSIR NET Chemistry Dec 2024 Crash Course👉 bit.ly/3CACSEs 📩 Download "VedPrep" App: bit.ly/vedprepapp हम नहीं, हमारा RESULT बोलता है| Trusted by Toppers 📚 IIT JAM 2026, CSIR NET 2025, and GATE 2026 📚 Eklavya Batches Delhi Branch | Offline Regular Batch 👉 Batch Start: 2nd Jan 📚 Ved Sir Learning Course (VLC): Brahmastra | Live Batch 👉 Batch Start: 5th Jan 📚 Eklavya Batch | Jaipur Branch | Offline Regular Batch 👉 Batch Start: 8th Jan 📚 Eklavya Batch | Delhi Branch | Offline Weekend Batch) 👉 Batch Start: 19th Jan 📞 𝗙𝗼𝗿 𝗮𝗻𝘆 𝗾𝘂𝗲𝗿𝗶𝗲𝘀 𝗥𝗲𝗹𝗮𝘁𝗲𝗱 𝘁𝗼 𝗖𝗦𝗜𝗥 𝗡𝗘𝗧 | 𝗚𝗔𝗧𝗘 | 𝗜𝗜𝗧 𝗝𝗔𝗠 | 𝗖𝗨𝗘𝗧 𝗣𝗚 | 𝗨𝗣𝗦𝗖 𝗳𝗲𝗲𝗹 𝗳𝗿𝗲𝗲 𝘁𝗼 𝗰𝗼𝗻𝘁𝗮𝗰𝘁 𝘂𝘀 @ 𝟵𝟭𝟯𝟲𝟱𝟵𝟳𝟮𝟰𝟰
@todayupdate5151
@todayupdate5151 3 жыл бұрын
Very nice 👍👍👍
@jatintiwari6525
@jatintiwari6525 4 жыл бұрын
Thanks so much sir Please upload thermodynamics !
@patrathoughts2579
@patrathoughts2579 2 жыл бұрын
Sir it is best.....
@VedPrepChemAcademy
@VedPrepChemAcademy 2 жыл бұрын
🙏🙏 Thank you. Stay Connected & keep sharing!!! 🙏 🙏
@mukuldeo2166
@mukuldeo2166 4 жыл бұрын
Sir previous chemical bonding ka ek question hai H3O+ ka bond angle kitna hoga ...google me sb alag alag answers mil rhe. Kahin 107 khin 109.5 to kahin 113° bta rha hai.....Ab aap hi sahara hai sir ..Doubt clear kr dijiye plz
@krisnendubiswas3374
@krisnendubiswas3374 4 жыл бұрын
h30+ hybridization is sp3 and as it does not have any loan pair, so accurately 109.28 .'
@mukuldeo2166
@mukuldeo2166 4 жыл бұрын
@@krisnendubiswas3374 bhai ye kaha padha ki H3O+ me lone pair nhi hota h
@aychemistry5052
@aychemistry5052 3 жыл бұрын
Sir ye jo aapne last me btaya ki sigma se sigma star k bich gap bhut high hota h toh ye pta kaise chla ki kb high hota h kb low
@mohdatif5689
@mohdatif5689 4 жыл бұрын
Dedication level 🔥🔥🔥🔥 Sir you are truely a legend
@Rp63888
@Rp63888 3 жыл бұрын
Nice class sir 🙏🙏🙏
@nandinipandey9219
@nandinipandey9219 2 жыл бұрын
Good lecture sir keep it up
@rashikhobragade851
@rashikhobragade851 3 жыл бұрын
Thank u sir 🔥
@himanshushekhar4158
@himanshushekhar4158 4 жыл бұрын
Sir aapne Bohr model ka example deke smjhaya k gap decrease hota jaise jaise shell bdhte h but sir cl,br ,I KR case me shell to same hi hai
@priyalmittal2301
@priyalmittal2301 3 жыл бұрын
No... Here shell is increase in cl e comes in 3 shell for br 4 shell and so on
@pragatijain788
@pragatijain788 Жыл бұрын
best explnation sir
@VedPrepChemAcademy
@VedPrepChemAcademy Жыл бұрын
Thank you! 👍 👍 Stay Connected & keep sharing!!! 🙏 🙏
@ashwanisingla9196
@ashwanisingla9196 3 жыл бұрын
Great ❤️❤️❤️❤️
@abidmir5422
@abidmir5422 2 жыл бұрын
Thank you chem academy
@VedPrepChemAcademy
@VedPrepChemAcademy 2 жыл бұрын
Welcome! 👍 👍 Stay Connected & keep learning 🙏 🙏
@veeru_sagar2471
@veeru_sagar2471 4 жыл бұрын
ua old student sir... my inspiration
@ayahnhdjs2396
@ayahnhdjs2396 3 жыл бұрын
Thank you sir 🙏
@vaibhavchauhan4765
@vaibhavchauhan4765 4 жыл бұрын
Lect 3 , MOT Ka harmonium bajta hua.🔥💪
@riospeaks859
@riospeaks859 Жыл бұрын
Excellent
@VedPrepChemAcademy
@VedPrepChemAcademy Жыл бұрын
👍 👍 Stay Connected & keep sharing 🙏 🙏
@srashtiagrawal4790
@srashtiagrawal4790 4 жыл бұрын
Sir always rockssss....
@prabhaghintala499
@prabhaghintala499 4 жыл бұрын
Revenge chemistry se .chem's academy...khela mne bhi khela
@shiwanichoudhary8589
@shiwanichoudhary8589 4 жыл бұрын
Sir ... Kya MOT IIT Jam mein aata h ?..... Because ... Syllabus mein toh sirf VESPER theory di hui h.... Pls sir ... Reply...
@GagandeepKaur-nz9tf
@GagandeepKaur-nz9tf 3 жыл бұрын
Thank you very much sir
@sumitverma9480
@sumitverma9480 4 жыл бұрын
Ved sir Thanku so much... 🙏🙏
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Welcome share with your friends
@ushadevi7298
@ushadevi7298 10 ай бұрын
Aj to sab clear ho gya koi doubt hi nhi raha
@VedPrepChemAcademy
@VedPrepChemAcademy 10 ай бұрын
👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@aychemistry5052
@aychemistry5052 3 жыл бұрын
Sir energy gap low hoga kb s aur p k bich
@subhalaxmibehera7015
@subhalaxmibehera7015 4 жыл бұрын
Apna dhyan rakhiye 😘👍sir
@nishulohchab378
@nishulohchab378 4 жыл бұрын
Thanku sir 🤗
@ManojKumar-fb5wh
@ManojKumar-fb5wh 4 жыл бұрын
Fantastic
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Thank you
@mathswithdeepaksir3235
@mathswithdeepaksir3235 4 жыл бұрын
Sir colour appearance is the property of ionisation why you say that s-p mixing affect colour 🤔 28:00
@vedprakashtugnayat
@vedprakashtugnayat 4 жыл бұрын
No aarohi...Colour appearance is property of transition ....And how orbital mixings affect colours....Will see in upcoming lectures
@roshnidevi4276
@roshnidevi4276 4 жыл бұрын
@@vedprakashtugnayat Yes sir👍👌
@meenuverma3714
@meenuverma3714 4 жыл бұрын
Thnku sir ....a lot..
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Welcome, share with your friends
@ayushaher5646
@ayushaher5646 4 жыл бұрын
Amazing
@05_FuNnY_cArToOn
@05_FuNnY_cArToOn 2 жыл бұрын
Omg.... वैतरणी के उस पार वाला डायलॉग सर का😂😂😂😂
@pranjaljain_65
@pranjaljain_65 3 жыл бұрын
🔥🔥🔥
@class5212
@class5212 4 жыл бұрын
Happy teachers day to all
@mdsamimahamed3891
@mdsamimahamed3891 4 жыл бұрын
Super sir
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Thank u share with your friends
@achitasharma6604
@achitasharma6604 4 жыл бұрын
Asa lagta h... Padte hi rahe.....
@soda_yodaa
@soda_yodaa 4 жыл бұрын
Sir, please take care of your health!
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Dhanyevad , keep sharing with your friends
@krisnendubiswas3374
@krisnendubiswas3374 4 жыл бұрын
It is so sad that though sir is giving such great content, he has to ask for likes.
@100vip
@100vip 3 жыл бұрын
Amazing explanation sir Aanand hi aa gya
@anuragchauhan-gq1tv
@anuragchauhan-gq1tv Жыл бұрын
Waaahhh
@VedPrepChemAcademy
@VedPrepChemAcademy Жыл бұрын
👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@sandhyarani5313
@sandhyarani5313 4 жыл бұрын
Awesome sir
@SewandSmile19
@SewandSmile19 4 жыл бұрын
👍👍
@munushreekar3653
@munushreekar3653 3 жыл бұрын
❤❤
@kushaldubey3341
@kushaldubey3341 4 жыл бұрын
👍👍👍💥💥💥💥💥
@chemacademysupport5280
@chemacademysupport5280 4 жыл бұрын
Dhanyevad Share with your friends
@zombieshunter8889
@zombieshunter8889 4 жыл бұрын
br2and l2
@mansoorabanoo6216
@mansoorabanoo6216 3 жыл бұрын
🙏
@sandipkarak6232
@sandipkarak6232 4 жыл бұрын
👌👌👌💝💝💝
@masumamazumder8138
@masumamazumder8138 2 жыл бұрын
Sir Your Health is not well thn also 🙏🙏🙏🙏
@TeenaSaini-ox7mv
@TeenaSaini-ox7mv Жыл бұрын
Hindi.mi.class.sir.bsc1year
@VedPrepChemAcademy
@VedPrepChemAcademy Жыл бұрын
Noted!👍 👍 Stay Connected & keep sharing!!! 🙏 🙏 ✅ 𝗗𝗼𝗻'𝘁 𝗙𝗼𝗿𝗴𝗲𝘁 𝘁𝗼 𝗦𝘂𝗯𝘀𝗰𝗿𝗶𝗯𝗲 𝗬𝗼𝘂𝗧𝘂𝗯𝗲: bit.ly/3PJipin
@kapildevsharma3117
@kapildevsharma3117 3 жыл бұрын
Thanks sir 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻💐
@swatichaudhary9929
@swatichaudhary9929 3 жыл бұрын
Thank you so much sir
@harshvardhangaikwad8571
@harshvardhangaikwad8571 2 жыл бұрын
🙏
@divya-c6v
@divya-c6v 2 жыл бұрын
Thanks sir 🙏
黑天使被操控了#short #angel #clown
00:40
Super Beauty team
Рет қаралды 61 МЛН
BAYGUYSTAN | 1 СЕРИЯ | bayGUYS
36:55
bayGUYS
Рет қаралды 1,9 МЛН
Правильный подход к детям
00:18
Beatrise
Рет қаралды 11 МЛН
MOT-Molecular Orbital Theory | MOT Revision Session | Chem Academy
1:28:23
VedPrep Chem Academy
Рет қаралды 14 М.
Coordination Chemistry CSIR NET | Ambidentate Ligand | Site Selection Principle
1:37:40
Татьяна Черниговская ("Как научить мозг учиться?")
1:33:57
Проект Открытое пространство
Рет қаралды 11 МЛН