2:14 video start 3:30 law of conservation of mass 4:20 law of constant proportion 6:27 question....??? 7:40 Dalton atomic theory 12:46 compound 20:09 mole concept
The question is supposed to be 32g of oxygen and 4 grams of hydrogen Then u need to add both the masses as thought in the lesson the mass of a+b = to the mass of compound formed Therefore 4+32=36 Therefore option A is the right answer
6:27 - 7:36 Ans :- a.) 36 g of water -> 2 H2 + O2 =====> 2 H2O So 4 g of Hydrogen will react with 32 g of Oxygen to form 36 g of water. Here hydrogen is the LIMITING AGENT. (4 g) Oxygen is present in excess amount (34-32= 2g). Therefore 36 g of water will be formed and 2- g of Oxygen will be left unreacted
@@minobegum7269 law of constant proportion means 1:8 in case of h2o so 4 :32 so the if we simplify it will become 1:8. 2g oxygen remain unreacted. And according to law of conservation of mass 4+32=36g water. If i am wrong you can correct me.
Yes ofcourse! See that you know law of constant proportion it's mean that all elements are present in definite proportion by mass so the ratio of water should be 1:8 and it can't be change so when we calculate the ratio of 34/2 we will not get 1:8 that's why 2g of oxygen will wastage it can't be useful anymore.... Hopefully you understand if not then you can ask once more I will explain more..
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hydrogen and oxygen combine in the ratio of 1 :8 by mass to form water .what mass of water would be required to react compl etely with 4g of hydrogen gas and 34g of oxygen gas answer is 36 g water is it correct mam
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@@bathinikullayappa4472 The ratio with which hydrogen combines with oxygen = 1:8. Thus, 1g of Hydrogen + 8g of oxygen = 9g of water. Therefore, 4g of hydrogen + 32g of oxygen = 36g of water.
The second question is supposed to be 32g of oxygen and 4 grams of hydrogen Then u need to add both the masses as thought in the lesson the mass of a+b = to the mass of compound formed Therefore 4+32=36 Therefore option A is the right answer
@@amishanarayan5396 see according to first law of chemical combination ie; the law of conservation of mass the mass of reactants will be equal to mass of product. So here, there is 34g of oxygen and 4g of hydrogen so the mass that will come out will be (34+4=38) 38g.
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Video start by 2:14
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2:14 video start
3:30 law of conservation of mass
4:20 law of constant proportion
6:27 question....???
7:40 Dalton atomic theory
12:46 compound
20:09 mole concept
Thanku
How could someone do this for no personal interest
Thanx
@@siddhant7591 some of the legends who know that time is precious and we are watching this one day before exam
@@laxmisharma9599 true
6:18
In case of CO2 :
Mass of C = 12
Mass of O = 16 and for 2 atoms of oxygen it is 16x2 which is 32
So, 12:32
Simplest ratio = 3:8🙂
Please explain for 7:07 also
@SPD how??
Kaise bhai
Sayad 6:7
The question is supposed to be 32g of oxygen and 4 grams of hydrogen
Then u need to add both the masses as thought in the lesson the mass of a+b = to the mass of compound formed
Therefore
4+32=36
Therefore option A is the right answer
ANSWERS* :
Q1=3:8
Q2=38 g
Q3=(b)
Can you tell me how it is b in question 3 rd
@@uglymugssin If 1 mol O2 molecules = 6.0022*10²³ molecules . then
0.5 mol O2 molecules = 6.022*10²³ /2 = 3.011*10²³ molecules
Tq
Answer of Q2 is 36 g and not 38 g
6:27 - 7:36
Ans :- a.) 36 g of water
-> 2 H2 + O2 =====> 2 H2O
So 4 g of Hydrogen will react with 32 g of Oxygen to form 36 g of water.
Here hydrogen is the LIMITING AGENT. (4 g)
Oxygen is present in excess amount (34-32= 2g).
Therefore 36 g of water will be formed and 2- g of Oxygen will be left unreacted
Good job todoroki
@@parzivil8837 :D
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Mam answer of CO2 is
Carbon = 6×2 =12
Oxygen = 16×2=32
12/32 =3/8 = 3:8
Right brother
Ratio of Co2 :-
(12×1):(16×2)
12:32 = 3:8
Yesss
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M
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Me bro , tomorrow is my exam and i am doing it today 😜lol
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Same
co2 - 3:8 , Q1) Ans)38g of water because of law of conservation of mass,Q2)Ans)b
Thanks
Its 36 gm , not 38gm
Because of the ratio 1:8
@@idolninjagaming3101 thank
The last chart of how to find moles was just incredible..
Thanks Vedantu!!
Q1 ans 36 g of water
Because 4g of hydrogen can only react with 32g of oxygen to form water
Therefore 32+4=36
Can u please explain how
@@minobegum7269 law of constant proportion means 1:8 in case of h2o so 4 :32 so the if we simplify it will become 1:8. 2g oxygen remain unreacted. And according to law of conservation of mass 4+32=36g water.
If i am wrong you can correct me.
@@chinmaycreations5634 thank you so much
@@chinmaycreations5634 TQ bro
What about 34 grams of oxygen
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@@jagrativishnoi2973 Me also but on exam day
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6.022*10^23 which equals the amount of molecules in 1 mol of Oxygen. So 0.5 mol of Oxygen has 3.011*10^23 atoms.
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Ans is 36 g of water because the ratio of water always should be 1:8 so we have to take oxygen 32 not 34 then the ans will be 36g
Can u explain???how 🤔 1:8 is ratio of water how we count 32 how we can get 32
Yes ofcourse!
See that you know law of constant proportion it's mean that all elements are present in definite proportion by mass so the ratio of water should be 1:8 and it can't be change so when we calculate the ratio of 34/2 we will not get 1:8 that's why 2g of oxygen will wastage it can't be useful anymore....
Hopefully you understand if not then you can ask once more I will explain more..
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Me ... ..u are k pop lover...
@@7puresoulkingdom659 yes... How do u know?
6:20 CO2
ratio of mass=
12x1:16x2
=> 12 : 32
=> 3 : 8
1st MCQ option (b) is right option because according to law of conservation of mass - mass of the reactants will always equal to mass of product
No, it will be a) because, ratio is 1:8 so 4(1):4(8)= 4+32=36 g
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hydrogen and oxygen combine in the ratio of 1 :8 by mass to form water .what mass of water would be required to react compl etely with 4g of hydrogen gas and 34g of oxygen gas answer is 36 g water is it correct mam
How please give reason
@@MrMe-ri2ri no, the correct ans is 36 g
@@vijandersingh7144 ok thanks for informing
It's crct
How plz give the complete worked answer
Just wish me best of luck... Cuz,, just right after half an hour is my exam...
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Totally ultra pro max legend 🤣🤣😂🤣😂😂😝😝😝
Law of conservation or mass was given by Lavoisier in 1774 not in 1744
Ryt...
Yes bro I m also thinking that mistake
But in google it is 1789
😵😵😵
😵😵😵😵
Mam question 1 ka answer option (a) hoga
Answer = 3:8 because carbon mass is equal to 12 nd oxygen is 16 so co2 will have 12 : 16 x 2 after simplifying 3:8... 😀
2:09 class starts..
No it started at 2:16
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dude video starts at 00:00
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All the best for tomorrow's science exam
HOMEWORK QUESTION
ratio by mass of co2=
Mass of C IN Co2 is 12 and mass of O2 is 2*16 = 32
So the ratio of their mass is 12:32 =3:8
b.) 38g because Hydrogen + oxygen = Hydroxide so mass of hydrogen and oxygen = mass of hydroxide
Co2 : (homework)…
Atomic mass of co2*1 : atomic mass of O*2
= 12:32 = 3:8
Therefore, ratio of Co2 is 3:8 😊
No 4:8
Correct bro it,s 3:8 🤗
@@adgamingboss4184 he is correct 3:8
How do u find can you explain me?
Plzz guys check another channel Bhai ki phadai awesome teacher
yeahh
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Ma'am if you can take a lesson for class 7 then can you pls take on atoms,molecules and radicals.. Your videos are awesome.. Pls
hye mam please tell me something about Newton first law of motion
06:20 the chemical composition ratio will be 3:8
3:4
😅 sorry you are right
6:16
6: 16
6:14 atomic mass of c =12 and o =16 so co² = 12+16×2 = 12 + 32
so ratio of co² =12 : 32
In, simplest form =3:8
Mole= mass of molecule /given mass
Moles=16/0.5=160/5=32
32 moles
32*6.027*10power(24)
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Q-1 ans-34.
Because the hydrogen and oxygen to combine completely to 32+4=36...Ans... 👍👍
You made a mistake dude
Tell me right ans!?
On the above he wrote 34 and then 36 dude
Oh ya!!😂
19:26 , everything crystal clear on board can easily understand you writing .
🤣🤣
@@Ariana-gw7pd 🤣
Maam, conservation of mass was given by Lavoisier in 1774, not 1744. please correct it, ma'am, please.
7:26 Could anyone please tell the answer..??
Is it 38 ..??
Sorry to disturb but did you find out how to solve it, if you did can you write how to
My exams are in school😢😢😢
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Ohhh damn unlucky but all the best
Same
38 grams of H2O because of the law of conservation of the mass
In case of CO2 it's ratio 3/8
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1. ANSWER :- option (b) 38 gram of water ... Because H2 + O2 = 4 + 34 = 38g
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Mam! The effort you took to make things crystal clear, was amazing , full concept covered !!
Thanks a lot
15:27 thankyou mam ❤❤
Your way of teaching is very interesting
Amazing teaching method in COVID 19 😆
WAH!
armmmmmyyyyyyyy💜💜💜💜
Army here!!! And BTW true!!
@VENKATASAI KEERTHAN PALA SOSH UMM EXCUSE ME U LITTLE SENSELESS HUMAN!! DO U EVEN KNOW WHO THEY ARE!! I THINK U NEED AN EYE BRAIN EAR AND A FULK BODY CHECKUP CUZ U CANT SEE AN ULTIMATELY TALENTED PERSON WITH YOUR FREAKIN EYES I ADVICE U TO GO TO A DOCTOR
@@seemapareek4622 perfect armyy! im too an armyyy
@@seemapareek4622 yo!! U R Right
answer b is correct
to find molecules we have to multiply mol by avogadro no
and to find atoms we have to divide mol by avogadro no
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Mam Ur teaching is just fantastic 😊🙏🏻but mam I am not able to get ur first lecture in Chapter 3 atoms and Molecules please help
1 McQ option B is correct because = 4g+34g=38g
The chapter start on 2:10
Thanks 😀☺️
💜army
4g of H and 34g of O2 = 4u H and 34u of O = 38g of H²O /water
36g hoga
fix ratio h
Yes
The rest 2 gram is extra oxygen
36gm hoga
its 36 btw cuz its in the form of 1:8
6:28
Ratio = ⅛
Therefore, 4 : 32....2g will remain unreactant
Hence, option (a) is the correct option
Last mei addition kiya hai?
Answer is (b) of que 1
Mam answer is b by law of conservation of mass
35:49 QUESTION ANSWER IS (b)
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Check out vedantu 9 10 English channel
Ans 1) b 38g of water because of the law of conservation of mass
You can watch it on 1.25 x to save time, as time is precious before exams😂👌🏻
You should not comment to save your time , as time is precious before exams . 😁😁
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2x is normal for me 😎
I watched on 1.5x
don't ask me how I was able to understand
The question's answer is 38g of water (B)
But with 4g only 32g will react other will be left unreacted
So 36 g will be answer
Yes you are right 36 g will be the answer
@@vidyagurude4411 Thanks
🙂🙂
It's 36 g
12 : 32 simplest form 6 : 16
1st question answer is b because 4g +34g =38g
You told students great lovely and easy way to understand this is the best ability of a teacher I like it so much Thnx Mam lovely understanding by you
antione levoisier have given law of constant propartion in 1774 not in 1744 mam
ma'am the answer is B) 36 of water
Please tell how
@@bathinikullayappa4472 Which question of answer you need??
@@sanjeevdash4267 q.1 kaa please
7:33
@@bathinikullayappa4472 The ratio with which hydrogen combines with oxygen = 1:8.
Thus, 1g of Hydrogen + 8g of oxygen = 9g of water.
Therefore, 4g of hydrogen + 32g of oxygen = 36g of water.
The second question is supposed to be 32g of oxygen and 4 grams of hydrogen
Then u need to add both the masses as thought in the lesson the mass of a+b = to the mass of compound formed
Therefore
4+32=36
Therefore option A is the right answer
The mass of oxygen is not 32g its 34g so the answer will be 38g, according to law od conservation of mass by lovoiser
@@Aayeenigga what is the actual answer and how do yo calculate it?
@@amishanarayan5396 see according to first law of chemical combination ie; the law of conservation of mass the mass of reactants will be equal to mass of product. So here, there is 34g of oxygen and 4g of hydrogen so the mass that will come out will be (34+4=38) 38g.
10:13
C12H22O11
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Edit:Thanks for 1 likes
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true
Thank you mam 😊❤️ you cleared all my doubts......Thanks alot mam 🙏
Carbon 2 and oxigen 1
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No mam lavosier not given the law of conservation of mass in 1744 he given this law in 1774 mam 🙏🙏🙏🙏🙏🙏🙏🙏
Thxx mam you are best teacher of chemistry. Best 💯teacher.
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38 g 7:40
Ratio of mass of CO2 -3:8
Answer is (b) mam
You taught very good mam(≧∇≦)/
Mam kya atomic maas aur valency ques mein diya hoga kya ?
What are the timings and day for live classes ?
I was so afraid to give test of chemistry but now i am not!
Yes
@@suhaan1353 nhi nhi maine chapter padh liya tha toh pass ho gya tum apna socho kya kroge?
38 g of water ans of 1 q
Same