i was actually about to cry since i cannot understand our chemistry module but thaaankyou so much for producing this kind of contents huhu your videos helps me a lot🥺💛
The subscript numbers come from the molecule itself. H2O for example, There are 2 Hydrogen atoms and 1 Oxygen atom. Chemists don't write the subscripts for atoms with one, like Oxygen.
I got a test in 2 days about atoms ions and molecules molecules were my only difficulty but with this video I am now curtain that I will get a good grade thanks 👍🏻
Hello, i have a question: some of chemical reaction products have different compound subscripts, for example HNO3+Ca(OH)2 => Ca(NO3)2+2H2O, so here NO3 was put in the parentheses and was added subscript of 2, I can't understand from where or why, maybe there are some rules for it, i was trying to find but I don't found out
Thank you soo much, before i wasn't knowing what the number before the element symbol called , i was thinking what am going to do now as i don't know . But you helped me to pass on my chemistry test thanks again
Thank you sir, for redirecting me to this video by giving the link. You are the best teacher of all time. You are REALLY helping me a lot in the holidays due to COVID 19. Thank you. And, HAPPY NEW YEAR TO YOU!!!!!!!!
If an atom is canceled on both sides to make it simpler, is there still a coefficient? Example: The HBr in Mg(s)+HBr(aq)->MgBr2(aq)+H2(g) *the twos on the right of eq are subscript
Sir good explanation 👏👏👌👌 Sir one small doubt , number of atoms in a element at product side of a chemical formula are called subscripts or not . There else the reactant side number of atoms in a element are only called as subscripts. Or both product and reactant side's number of atoms in a element are called subscripts.
The question you said at the end i got confused with why we cant change the subscripts but for the coefficients i think we're able to change it because you're only changing the number of molecules
I think your class may be wrong or some information was left out. it should be 2h2+o2 equals 2h2o. h2+o2=h2o without any coefficients is impossible. An oxygen atom can't just vanish into thin air. Most likely it was used as an example to demonstrate balancing a chemical equation.
Dr. Breslyn, do you have a good molecular shape chart? I'm trying to determine the geometry of covalent bonds. The chart in my textbook is very limited. Thank you : )
This video might help ruclips.net/video/Moj85zwdULg/видео.html and the chart in this one too for more complex molecules: ruclips.net/video/oF84GvdnpOc/видео.html
I have an important question!! 1) HCI + NaOH = H2O + NaCI What if there are no coefficients? What if we need to count our atoms but can’t because we can’t multiply subscripts x coefficients if there are no coefficients?
@@wbreslyn Oh gosh I feel stupid, I forgot about that after an all night studying, maybe I should’ve slept instead to rest my brain.. Thank you so much! I’ll keep this in mind. And also what if it has no subscripts? Do we use the coefficients or no?
Formula of water is H2O it it says water molecule is formed by 2 Hydrogen Atoms and 1 Oxygen Atom. But I have seen articles explaining concepts of Oxidation using H2 + O2 = H2O . then they further extend it by saying law of conservation of mass requires us to balance the amount of matter . My question is when we know that a single water molecule is produced From 2 Hydrogen Atoms and 1 Oxygen atom , why there is need to add 2 Oxygen Atoms ? Like this ... H2 +O2 = 4H2O.. 😅😅😅
It really depends how much you have to start with (as in how many grams you have), But if you have one mole of water you would have two moles of H and one mole of O atoms.
im so sorry i still dont understand why we cant change the oxygen to 2 sure its dangerous but this is science why i dont understand iv replayed this video 4 times i still don't understand
So when you change the subscript, like the 2 in O2, you end up with a completely different substance. It has different chemical and physical properties. O2 is necessary for cellular respiration - you die without it. O3 is ozone, a ground level pollutant. The CDC states: "Ozone (O₃) is a colorless to blue gas with a pungent odor. Exposure to ozone may cause headaches, coughing, dry throat, shortness of breath, a heavy feeling in chest, and fluid in the lungs. Higher levels of exposure can lead to more severe symptoms. Chronic exposure may lead to asthma." But changing the number in front just means you have more. 2O2 means two O2 molecules.
i was actually about to cry since i cannot understand our chemistry module but thaaankyou so much for producing this kind of contents huhu your videos helps me a lot🥺💛
You're very welcome!
No i was actually thinking to nuke IUPAC and my school
Brilliant explanation sir, You've cleared my all doubts that are generally given in textbooks
Glad I could help! --- Dr. B
Beyond grateful for this video and the precision in explanation 💛🥰
Thank you for this, I needed help for my quiz.
Glad it helped!
Thank u sm I understand now 🤗
Excellent! --- Dr. B
I just started my new semester in class 9 and ur balancing equations playlist helped more than u can think . Thank u 😊😊
All the best in class 9!
Thank you for this video
U know what u r the best teacher I hv ever got 🥰🥰🥰
Lots of luv from my side 🤗
Thank you for simplifying this. It finally clicked.
ah jeez. istg i was so confused with this stuff and thank you for giving me a hand with this! it really did clear my doubt :))
I don’t understand where you get the numbers from
how many atoms there are is the small numbers, also
*Impending doom approaches*
Wow this helped so much. Thank you!
Thank you so much this explanation was awesome and I understood it finally which I couldn't in any book!!!
Glad it helped!
I still don't understand where you get the subscript numbers from.
The subscript numbers come from the molecule itself. H2O for example, There are 2 Hydrogen atoms and 1 Oxygen atom. Chemists don't write the subscripts for atoms with one, like Oxygen.
Nobody except toppers actually does..
I got a test in 2 days about atoms ions and molecules molecules were my only difficulty but with this video I am now curtain that I will get a good grade thanks 👍🏻
What a video you make sir🔥🔥🔥❤️❤️❤️
Bro thanks so much this helped me alot
Happy to help!
Thank you so so much Dr B you're amax8hg and very helpful
😊
Thank you so much, this helped me, help my kid with their homework.
Happy to help!
I really needed this
Eternally grateful🙏🙏🙏🙏
Hello, i have a question: some of chemical reaction products have different compound subscripts, for example HNO3+Ca(OH)2 => Ca(NO3)2+2H2O, so here NO3 was put in the parentheses and was added subscript of 2, I can't understand from where or why, maybe there are some rules for it, i was trying to find but I don't found out
Thanks you. Watching your video helped me understand coefficients. And why there is multiplying.
Good to hear! --- Dr. B
Thanks, great video!
you literally saved me in the last 5 minutes before my online chemistry exam. god bless you
Hope your exam went well!
Thank you so much- finally a clear explanation
Thank you soo much, before i wasn't knowing what the number before the element symbol called , i was thinking what am going to do now as i don't know . But you helped me to pass on my chemistry test thanks again
You're welcome 😊
@@wbreslyn you got my sub🤗
Thank you sir
Thank you sir, for redirecting me to this video by giving the link. You are the best teacher of all time. You are REALLY helping me a lot in the holidays due to COVID 19. Thank you.
And, HAPPY NEW YEAR TO YOU!!!!!!!!
It's my pleasure and happy new year to you as well!
Thanku so muchhh sir..!!!❤️
Happy to help!
clarity in chemistry right here .... yep
Thank you 😊❤️ sir u make it easy for us . I'm so happy that I get it 😍 even I can't express my happiness in my words ❤️💕💕 thanks again ❤️
😎
@@wbreslyn sir could you tell me plse that from where you are??
@@user234edw I'm in the US, near Wash, DC.
@@wbreslyn okay sir , well I'm from India ☘️
@@user234edw Awesome, I've never been to India. Maybe one day!
If an atom is canceled on both sides to make it simpler, is there still a coefficient? Example: The HBr in Mg(s)+HBr(aq)->MgBr2(aq)+H2(g) *the twos on the right of eq are subscript
Can you change the coefficient even when it is there from the start?
Amazing explanation sir.
Sir good explanation 👏👏👌👌
Sir one small doubt , number of atoms in a element at product side of a chemical formula are called subscripts or not . There else the reactant side number of atoms in a element are only called as subscripts. Or both product and reactant side's number of atoms in a element are called subscripts.
My school was closed because of covid and I never got to know what is what
Thanks for explaining this
You are most welcome!
Concept is clear. Thank you.
Glad it was helpful!
Tysm ..very well explained
What about CO? Does it have 1 or 2 coefficient? Sorry I’m just confused about this.
If you have just CO we'd say the coefficient would be 1. The subscripts for C and O are also 1. We don't write them by convention.
The question you said at the end i got confused with why we cant change the subscripts but for the coefficients i think we're able to change it because you're only changing the number of molecules
Thank you sir..i was confused but now i get it❤☺
Most welcome 😊
SO TRUE BESTIEEEE
Sir if 2H2+O2=2H2O then till now in smaller class I just learnt h2+o2=H2O why?
I think your class may be wrong or some information was left out. it should be 2h2+o2 equals 2h2o. h2+o2=h2o without any coefficients is impossible. An oxygen atom can't just vanish into thin air. Most likely it was used as an example to demonstrate balancing a chemical equation.
@@davidan95 thank you sir...
Dr. Breslyn, do you have a good molecular shape chart? I'm trying to determine the geometry of covalent bonds. The chart in my textbook is very limited.
Thank you : )
This video might help
ruclips.net/video/Moj85zwdULg/видео.html
and the chart in this one too for more complex molecules:
ruclips.net/video/oF84GvdnpOc/видео.html
@@wbreslyn Thank you! I'll check them out.
Sir where we add and where we multiple the coefficients with subscriptions.
That's a very important question. Take a look at this video, it should help...
ruclips.net/video/zmdxMlb88Fs/видео.html
--- Dr. B
I have an important question!!
1) HCI + NaOH = H2O + NaCI
What if there are no coefficients? What if we need to count our atoms but can’t because we can’t multiply subscripts x coefficients if there are no coefficients?
We consider the coefficient to be "1" if one isn't written.
@@wbreslyn Oh gosh I feel stupid, I forgot about that after an all night studying, maybe I should’ve slept instead to rest my brain..
Thank you so much! I’ll keep this in mind. And also what if it has no subscripts? Do we use the coefficients or no?
@@bme7995 No problem. Sleep is probably one of the most underrated learning strategies!
Thanks sir
No problem!
- Dr. B
Formula of water is H2O it it says water molecule is formed by 2 Hydrogen Atoms and 1 Oxygen Atom.
But I have seen articles explaining concepts of Oxidation using
H2 + O2 = H2O .
then they further extend it by saying law of conservation of mass requires us to balance the amount of matter .
My question is when we know that a single water molecule is produced From 2 Hydrogen Atoms and 1 Oxygen atom , why there is need to add 2 Oxygen Atoms ?
Like this ...
H2 +O2 = 4H2O..
😅😅😅
Nice
Thank you!! very helpful :)
Glad it was helpful!
How many moles would be in H and O of H2O? would it be two moles of H and one mole of O? or one of each?
It really depends how much you have to start with (as in how many grams you have), But if you have one mole of water you would have two moles of H and one mole of O atoms.
Thanks for your help
Always welcome!
- Dr.B
Love your Videos
Thanks! --- Dr. B
How do you find sulfur coefficient? and how to find for every element coefficient?
We find coefficients when we balance equations:
How to Balance Chemical Equations: ruclips.net/video/zmdxMlb88Fs/видео.html
thanks i understand this more
Excellent! --- Dr. B
How many.molecules does oxegyn have
It depends how much you have (either grams or moles). This might help:
ruclips.net/video/aIv5nr8ZNyw/видео.html
Thank you 😊
You're welcome 😊
Thanks man Im a student an I was very confused
Glad I could help!
0:07 there's a mistake, H2 is a molecule, not a compound
Thanks for pointing that out!
Thank You
You’re welcome! ---Dr. B
K helful
Can a subscript number be as big as 14
Sure, even bigger.
pubchem.ncbi.nlm.nih.gov/compound/Tetradecane
--- Dr. B
thanks dad
Sir
I am a olympiad topper
International rank :1
Tq sir for making my chemistry cool...
All of them i did decipher becuz of uuuuu!
Awesome👏👍👏👍👍👍sir
Thanks!
Legend says he replies to every comment.
How could he not?
- Dr. B
Can you help me?
my teacher failed to educate me, but you havent.
What do coefficient and subscripts tell you.
Coefficients tell us the ratio of substances in a reaction. Subscripts tell us the number of the atom before the subscript.
Can you make a video on corrosion
I've been hoping to do a video soon about corrosion, especially redox reactions. Hopefully your comment will motivate me to get started!--- Dr. B
I need make NhNo3 -> N2O+2M2O
I'm guessing you mean NH4NO3 --> N2O + H2O
Like this:
ruclips.net/video/xHxB0VeA22c/видео.html
School??????????
ily
im so sorry i still dont understand why we cant change the oxygen to 2 sure its dangerous but this is science why i dont understand
iv replayed this video 4 times i still don't understand
So when you change the subscript, like the 2 in O2, you end up with a completely different substance. It has different chemical and physical properties. O2 is necessary for cellular respiration - you die without it. O3 is ozone, a ground level pollutant. The CDC states:
"Ozone (O₃) is a colorless to blue gas with a pungent odor. Exposure to ozone may cause headaches, coughing, dry throat, shortness of breath, a heavy feeling in chest, and fluid in the lungs. Higher levels of exposure can lead to more severe symptoms. Chronic exposure may lead to asthma."
But changing the number in front just means you have more. 2O2 means two O2 molecules.
Hahahaha if you can’t understand go back and watch. Bruh that’s funny
Nice
Thanks!