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
Doing some revision video searching as this way of learning is always the best for me and so glad I found your channel! Your videos are so clear and easy to understand, especially with your helpful diagrams and images. You definitely deserve some more subscribers :)
Been having mock CAE's recently, Your videos have been so helpful i thank you so so much Was super super confident in my chemistry and biology thans to you!! Physics next week :)
in the definition of finding the relative formula mass did you mean to write: add together the relative atomic mass of all the elements in that compounds molecular formula?
is the relative molecular mass the same ?in my spec (for igcse) it says calculate the relative formula masses(including relative molecular masses) from felative atomic mass
i still dont really understand. I tried to do the last one with the oxygen by myself so i could just check the answer later to see if i understood, but i accidently used proton number in each element, after i got the answer i understood that and redid it. With relative atomic mass i got 43.8%, and the answers when i used with proton numbers where almost similar, the one with proton numbers was 43,2%, which is the correct answer as the video says. So what method should i use exactly? Does one decimal means anything or i could just use any of those two methods and leave the decimal behind?
At 3:19 I believe a mistake is made. It should be 16 + 1 (Oxygen + Hydrogen) which equals 17 (the relative formula mass for OH i.e. Hydroxide). Then 17 is multiplied by 2 as there are 2 hydroxide molecules present which equals 34.
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
Simple. To the point. No messing around. Best video I've seen on RFM.
Good luck to those doing chemistry tomorrow!!
Thank you, I'm gonna fail😭
tysm i need it fr😭
I'm having it tmr lmao
@@kirki221did you fail?
did u fail?@@kirki221
Just got 3 questions on exactly what this video was talking about,
My goodness this guy is good, definitely subbed
😁
So beneficial, thank you for your simplicity and clarity
Hi Ahmad, really happy to hear you found it useful. Thanks for taking the time to comment, it really helps us out :)
Doing some revision video searching as this way of learning is always the best for me and so glad I found your channel! Your videos are so clear and easy to understand, especially with your helpful diagrams and images. You definitely deserve some more subscribers :)
Hi Lottie thanks so much for the kind comments! Really happy that you find them useful!
And I also want to say I had my chem mock today and your videos help me so much..your a lifesaver thank you
Love the simplicity in this video, so much easier. Thanks!
I actually finally understand. THANK YOU!!!
Haha thanks Kim! Relative formula mass is a bit of a weird one to get your head around, so really happy to hear this was helpful 😇
No problem
Me too!
Me too
@@Cognitoedu its easy
This is the one stop tutorial guys so if u donno or find Mr mass finding hard its really simple with his explanation.... thx a lot
Thank you! You weren't too fast or too slow. You went at the right pace.
This video is AmAzing. Couldn't really get my head around it when my teacher taught this... Thanks alot
You saved me, tysm for thiss.. Stay safe and strong, good luck for your channel. All the best man, you're great!
May Allah grant you peace and wealth, your videos are very helpful to anybody who comes across them!
ameen
Amen ya rab alalamen
You wouldn't imagine how could this helped me out!!!
I really thank you by my heart!!
i swear this explains me better than my chemistry textbook (textbook makes things x100 complicated than it really is istg)
thanks for the vid
Been having mock CAE's recently,
Your videos have been so helpful i thank you so so much
Was super super confident in my chemistry and biology thans to you!! Physics next week :)
your channel intro is so satisfiying jees
Bro you made it so simple thank you I have chemistry test tommorow
your video is very easy to understand ! thank you !!
Thank you so much .I was so confused and worried about my exam 💗
Glad we could help HHA, good luck 🤞
Man! Cant express my gratitude to you
Thanks farida!!!
This channel is so useful I love the diagrams thankyou this helped so much
Thanks, glad you're finding the animations helpful 😊
his voice sets me at ease for somereason
Amazing explanation. Understood really well!!
Thank it really helped me out I was looking at my region guide and I still didn’t get it it but thanks to u I appreciate that a lot
Hi Maariya! Thanks for the comment, and really happy to hear it helped you! Good luck with all your work 🙌
Thank you
This guy deserves an award or something your gonna save me from my cies❣
Aah thanks Naseem, good luck with your cies 🙏
hi HEY! i finally understood thanks to you! my teacher did explain it but i didnt get it but thanks to YOU!!!
Whys it gotta get so complicated so damn quickly?! I still don't understand even after watching this video. which is uncommon for me
@@SajjadAli-er4fh yeah this was long ago, i actually get it now XD
I never said thank you to you mate, you're awesome
THANK YOU SO MUCH THIS VIDEO WAS VER HELPFUL!!!
OMG!! thank you so much!! I have a chemistry test on this in a week and this defo helped me out!! :DD
Ah so glad we could help, all the best with your test! 🤞
tysm i used this to revise for my end of years
in the definition of finding the relative formula mass did you mean to write: add together the relative atomic mass of all the elements in that compounds molecular formula?
Hope you reach 1 M, you really deserve as lottie said
Great video. Loved it !
this helped me out so much. thank you!
THIS saved my life!!!!!!!
YAY 🙌
youre a living legend
Another great and simple explanation, thank you.
thank you for the A+ in my chem exam !!!
Good video, helped a lot!
You explain better than my teacherrr
whyd ya only get 1 like but another person who said the exact same thing got 150
is the relative molecular mass the same ?in my spec (for igcse) it says calculate the relative formula masses(including relative molecular masses) from felative atomic mass
you are the best man
Your a legend thank you so much 👏🏻👏🏻
No problem 👍
this is so helpful thanks a lot
thank you so much!! you explained it so well
i still dont really understand. I tried to do the last one with the oxygen by myself so i could just check the answer later to see if i understood, but i accidently used proton number in each element, after i got the answer i understood that and redid it. With relative atomic mass i got 43.8%, and the answers when i used with proton numbers where almost similar, the one with proton numbers was 43,2%, which is the correct answer as the video says. So what method should i use exactly? Does one decimal means anything or i could just use any of those two methods and leave the decimal behind?
Soo underated!
I got chemistry mock paper 1 tommorow and I am trying to revise as much as I can to get moved to higher
I love your video so much❤❤
holy i understand chemistry THANK U DEFFO SUBBED
🙌 🙌
Thx you i finally understand what i thought was gibberish
wait i confused again
Already on 1K Subs.
great as always
Hello there! I just wanted to ask if this is the same as relative atomic mass (with Isotopes)?
I don’t seem to understand this part 0:50
Question here👋 is molecular mass measured in grams or no unit?
Can you make a video on molecular and empirical formulae please
😂 where’s my year 11’s at good luck for us guys 💔
bro my exams are like next week 😪😔
Does the critical temperature increase as the relative formula mass increases?
LIFESAVER. THANK YOU.
How do I do this topic since it doesnt show (in your website)
i hate hate hate science🙄✋ur videos get me through it tho thanks 🏃♀️
Hey for the the last question when it said 74 where did you get that from?
Nice vid
This was so helpful
Thank you . I might not pass but at least great relative formulas correct
so true lol
goodluck tmr
So helpful thank you, my teachers are useless
Do you have a video covering empirical formula?
Thank you for this
thank you so much for this, hopefully i do well in my exam tomorrow. wish me luck :(
hyh\jp;
excuse me, how are you, what is the RFM of 0.3 g of oxygen and volume of 224cm cubic
Thanksss bro 💯🔥💪👍🙌👏🏅🥇🏆🌟🙏👏💰💰💰😁🙏👏
I love you cognito so much
God Bless your mother
Cuz this much knowledge cannot be explained by a mortal human
Thank you sooo much❤❤❤❤❤
I have understood all except the percentage bc I am confused about what I should do about the (32×1)/98
Why is no one liking ???
I reckon they're just playing it cool...
There being in COGNITO
@@mikewazowskigaming3029 They are being in cognito but good joke man
@nabeel thanks man!
They are busy noting ❤
At 3:19 I believe a mistake is made.
It should be 16 + 1 (Oxygen + Hydrogen) which equals 17 (the relative formula mass for OH i.e. Hydroxide).
Then 17 is multiplied by 2 as there are 2 hydroxide molecules present which equals 34.
nope cuz we r looking for the mass in oxygen not in hydrogen and oxygen
Ar vs Mr which one is it?
i got taught in skool that it was Ar
Tq so so so much
Hello! What if we have something like 2H20?
My gsce biology teacher uses these videos in everyone one of his lessons shout out big man T 😂😂
Thanks
i think you made a mistake at 1:55, 32+1+64 is 97, not 98.
Thanks for the feedback! I think you might be missing the second hydrogen in your workings?
@@Cognitoedu ohhh yes, sorry my mistake 🤦♂️🤦♂️😅
tysm
Thanks bro
i hate quantitative chemistry
the video image is too poor, you need to fix it more
Is you’re video quality setting turned down?
this is the first time I do not understand anything in Cognito's video
Bro I’m using gcse chem to revise but i study ncea
Tomorrow’s my chem. exam
Help!😢
what are iscotopes
There’s one element but 2 different numbers of neutrons
@@jaiden4775 ok thx so much
Zoo wee mama
love itttttttt
❤
I am in class 3
open a school man\