If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom

No atoms were created or destroyed in the making of this video…

@REAlRealPro

2 жыл бұрын

lol

@moeezaviation

4 ай бұрын

lol

@mxnnha

Ай бұрын

lol

Simple no nonsense explanation. Thank you!

Best explanation I’m doing my GCSEs next year and this has just helped me make sure I know it

I’ve missed loads of school from being sick and I’ve got to catch up a whole year of chem and these vids are amazing!! Especially with brain fog 😅

This video is so underrated

@alex3051

2 жыл бұрын

No

@jph5198

2 жыл бұрын

@@alex3051 Yes

Best channel ever thank you

THIS HAS HELPED ME SO MUCH THANK YOU

thanks man it helped for the chemistry exam!!!

That was the best explanation. I am doing my IGCSE chemistry next Oct/Nov and I love this channel so much, it is so underrated!!

@ReaM20

5 ай бұрын

I don't remember writing this😭

@ReaM20

5 ай бұрын

But this Channel is helpful

@tasnimjafar8873

3 ай бұрын

What did you get tho

@ReaM20

3 ай бұрын

@@tasnimjafar8873 Umm I made a typo I meant Oct/Nov lol

@tasnimjafar8873

3 ай бұрын

@@ReaM20 im giving this year may june😭

Solid video lad

Thank you from Egypt 💐🌻

the best vedio for this subject thanks alot and: )

@eliteds4200

3 жыл бұрын

Video*

@DerpyMemeLord

2 жыл бұрын

@@eliteds4200 Vdieo

@farhanahmedheathland5923

2 жыл бұрын

@@DerpyMemeLord yo what set r u for english

@zak2478

Жыл бұрын

@@farhanahmedheathland5923 2 :)

@mels.strawbs

Жыл бұрын

@@farhanahmedheathland5923 im in one

Thanks for the video

Thank you🥰. From VietNam

Thank you very much sir

Thank you......from malaysia

at 0:48, why do you times Sodium Ar by 2, i thought you don't take the balancing number into account when calculating Mr? pls help somebody

@cheesyrat3608

2 ай бұрын

You do take the balancing number into account. It's how many lots of it you have so you multiply the grams given by the little or big number and make sure it's equal on both sides of the reaction

Thank u bravs

Thank you

isnt the mass of sodium 23?? at 1:28 he says the mass is 2.3, someone help please im acc so confused

@abortive1581

9 ай бұрын

The atomic mass of sodium is 23 but he showed it as 2.3g to show conservation of mass also applies to the actual mass of the reactants and products not just atoms

Thanks

Omg amazing

@rizahki

3 жыл бұрын

su fam

Thank you very much "Iam from Sri lanka"

@m.sindika608

Жыл бұрын

Hi I also Sri Lankan

Yr 11 mocks on Monday 😞

i will do one situp for every like this comment gets

@Linminazzxxx

3 ай бұрын

U got to do 1 push up buddy LMAO

@kavfun-ll7im

3 ай бұрын

@@Linminazzxxx lol

@Linminazzxxx

3 ай бұрын

@@kavfun-ll7im did u do it🤨🤨

@kavfun-ll7im

3 ай бұрын

@@Linminazzxxx yesss queen

@kavfun-ll7im

Ай бұрын

@@Linminazzxxx HAH ACTUALLLlly i have to do 5 SITUPS in ur FACE MWAHAHA🤑

wtf? i thought large numbers didint affect the relative forumla mass but 2Na is now 2 times Na????!??!?!?!??!?!?!

@agirlwithhair9054

Жыл бұрын

Yes

@tony-tq5ck

11 ай бұрын

It's 2 x the relative mass

@abortive1581

9 ай бұрын

Relative formula mass is the total mass of atoms in a molecule or compound

Hello professor , can I ask you a simple question : imagine if you put a quantity( amount) of water in a glass ( simple glass) , can you put this water in another glass ( I mean : to the extent of 100% of quantity of water ) , can you carry this amount of water( 100% of amount) in another glass ( to put all quantity of water in another glass( without losing any drop or molecule of water during the transportation) , can you do that ? I think If you would try it you wouldn't, if you do that then your law( or equation) would be correct. Same thing happens when water condenses, is impossible to transport( to be transported)all amount of water ( all molecules) during the cycle of condensation,( during the rain formation ),it mean : the matter is losing during the cycles verify the physics pls,

@SOTM06

3 жыл бұрын

thats not a chemical reaction just pouring water from one glass into another

@radinelaj3932

3 жыл бұрын

@@SOTM06 then why water scompare ( during the cycle)?

@SOTM06

3 жыл бұрын

@@radinelaj3932 no matter is lost during the water cycle it is just changed from solid to liquid to gas throughout and scattered all over the globe.

@radinelaj3932

3 жыл бұрын

@@SOTM06 A debate for the law of conservation of mass/ energy ,I watched a video about these laws in you tube and I asked to him : Hello professor , can I ask you a simple question : imagine if you put a quantity( amount) of water in a glass ( simple glass) , can you put this water in another glass ( I mean : to the extent of 100% of quantity of water ) , can you carry this amount of water( 100% of amount) in another glass ( to put all quantity of water in another glass( without losing any drop or molecule of water during the transportation) , can you do that ? I think If you would try it you wouldn't, if you do that then your law( or equation) would be correct. Same thing happens when water condenses, is impossible to transport( to be transported)all amount of water ( all molecules) during the cycle of condensation,( during the rain formation ),it mean : the matter is losing during the cycles verify the physics pls, Someone reply to me : You need to distinguish between water being left behind and disappearing completely. As you transfer water from one glass to another you leave some behind so the original glass is wet , none of the water actually "dissapears"- matter is conserved . Same with the water cycle,, some water evaporates from the sea, but most remain as sea, some condenses as clouds, but some will remain as vapor ( gas) , some of the cloud will fall as rain but some remains as cloud- and so on. It's all there all the time Another ( someone) replied to me : That's incredible difficult, but you should know that the water you put in the glass will not go away. All of the contents in the first glass of water cannot be destroyed and the water cannot create any more water. It may change state( physically to ice or water vapour) but none of it will vanish, so technically it is possible to do this transfer a, and the law of conservation of mass is still correct. My rocket 🚀 reply was : My intention was to say : after a cycle the matter isn't turning back( at the extent of 100% )( all quantity, all molecules ,) By the way that is happening to the energy too, not only the matter is not turning back,but even the energy isn't turning back too ( as the matter isn't turning back too, so even the law of conservation of energy is not correct, These laws are atheists's laws, they are trying to say : we are eternal ,but that is not true. We're losing, friend ,matter is losing ,energy is losing,( everything is disappearing vanishing ,is losing) Were separating from energy,that is my law, Question : why energy is separating from the matter ? For example : sun is losing energy( heat or light ) where is going this energy ?! Are you saying : the energy will turn back ,it will conserve back into the matter ?; I doubt on it When I say : energy is losing I mean : is disappearing( vanishing) from our dimension ( our world) I can say another thing : if you transfer an amount of energy to another object ( from a battery to another) ,this energy will lose ( vanish ,disappear) anyway ,even you can transfer all energy ( all enectrons ,all atoms) ,it will lose (vanish) again ,or disappear( by casuality, spontaneously) The meaning is : you( all of you ) can conserve nothing ,nothing can be conserved ,that is my law, For example : if you transfer energy from a battery to another battery ( from a power bank to a phone), the phone will lose its energy after four(teen) days ( even if you wouldn't use it ), with other words : energy will separate from matter( from battery), like the sun 's energy,it is separating from it( the sun). Everything is separating ,that's my law. I have made a post in f book about this case ,against atheists ,with simply words the point is : the matter and energy are joined together,question is : who joined them ( it) ?! For example : sun ,sun is made by energy and matter , the sun is losing energy ( heat , light ) , it mean : it was made by two things : energy and matter ,it was joined together ,question is : who joined together them ? There were a high intelligence energy who joined( welded ) them ,( God)

@tony11chan41

3 жыл бұрын

@@radinelaj3932 dude, I think you need to read the chemical physics theory.

Any one else been sent this as chem homework? Lol

Someone help me out ! Someone heated 1.24g of copper carbonate strongly The chemical reaction which took place is represented by the equation: CuCo3(s) --> CuO(s) + Co2 (g) After they heated it he weighed it and found it’s mass was 0.80g They heated the 0.80g of solid again again. When they weighed it after cooling its mass was still 0.80g Explain why it has not changed mass this time

@s.s.scriptties

Жыл бұрын

this was 11 months ago so you may not need it anymore, but This is because all the copper carbonate has already been completely converted to copper oxide and carbon dioxide gas in the previous heating reaction. Since there are no more copper carbonate molecules for further conversion to take place, the weight of the sample does not change any further even after additional heating.

@d1orkisses

Жыл бұрын

@@s.s.scriptties WAY too late but thanks anyways

@mels.strawbs

Жыл бұрын

i dont know science is nonsense

no

Esh