Balancing another combustion reaction | Chemical reactions | High school chemistry | Khan Academy

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A balanced chemical equation shows the same number of each type of atom on both sides of the arrow. In this example, we balance the combustion reaction of ethane, C₂H₆.
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[@roshansemba]

Just a slight correction but at 4:01 instead of C₂H₂ it should be C₂H₆

[@perlaguzman4065]

It's true.

[@SolitarySoldier]

Roshan Sembacuttiaratchy that guy threw the whole problem off with messing up that subscript in the second equation written

[@jirimertin]

Still wrong. I just came because of this.

[@marysania2012]

It's not C2H2 ,it is C2H6

[@raghav3065]

4:01 mistake

[@khaleelmuqeem0205]

It should be like this 2C2H6+7O2 gives 4Co2+6H2O

[@irl_zulu]

I'm sure in cases of diatomic molecules you can have .5 as a coefficient

[@peter_roth_8812]

Try it with the photosynthesis: CO2 (Carbondioxide) plus H2O (Water) plus sunlight! reacts to C6H12O6 (Glucose)!
Nice exercise!

[@melodybaker3255]

What do you do when you can’t multiply decimals? My chemistry teacher doesn’t allow it

[@maxmocs5008]

You use an improper fraction
(This is probably more helpful to the newcomers seeing this than it is to you, Melody)

[@Aliacensis]

Nice job khan academy!

[@rukhsanahussain9134]

Amazing explanation 😊

[@tru_perseus4765]

My ESS teacher is not a great teacher to have, he just gives us the work to do without any instructions on how to complete it. (I know this because every other person who had this teacher for ESS agree with me and I witness this all the time)Anyway I was given this combustion of gasoline (isooctane): C8H18 + O2 -> CO2 + H2OI started factoring it and got 2C8H18 + 25O2 -> 16CO2 + 18H2O. Is this correct?

[@arsheyakak7621]

Tru_Perseus Yes:)

[@renusainisaini9477]

I like this khan academy vry much because in this i understand all the things which i want. and in this i
explaintion was vry nice i like this khan academy vry muvh

[@tarunbalaji8379]

At the end you should have C₂H₆, not C₂H₂

[@cannagorilla]

I am puzzled. How can you just say well... We will just multiply by 2. All equations must be balanced correct? So you can change the amounts of a coefficient when ever you need to?
I am new to chemistry so please forgive my ignorance. I am a home chemists..... More of a recipe follower really. I look up patents on Google and try to replicate. Not always easy as it looks. I know I should learn the theory before ever I enter a lab but I'm 39 and I haven't the time to go back to college again. But I love the manipulation of elements from one useful chemical to another. Thank you for the great videos and time you put into them.

[@janhavikatakdhond2196]

Even I have that doubt. But when went to comment I saw your... But no one answered. If you have find out the answer let me know

[@mitchellfreeman967]

it's like algebra. If you have a formula like 2x + 3y = w + 3.5z, you can double both sides (4x + 6y = 2w + 7z) without changing the real value of the equation. By multiplying all the coefficients equally, you don't change the value.

[@afraibnatparsha9827]

shouldn't u put = after balancing the equation?

[@arsheyakak7621]

Angel Parsha No, we always put an arrow for equations in Chemistry.

[@rj23032]

THIS IS GONNA BE LONG
Now, when you say that two things are equal, it means that they are physically and chemically equal based on their properties(you might say that when we say 2 apples are equal to 2 apples, do we mean all this? No we dont, simply because we dont define the meaning equal to in that way. We always target the magnitude (numerical data) when we refer equals to in real life.) Now there was ethane and oxygen on the right side and on the other there was carbondioxide and water, now, if we replaced the arrow by equal to, it means that one or both of the ethane and oxygen are either water or carbondioxide or both, but thats just not the case.(You cant drink oxygen or ethane saying that it was water...XD).

[@musicaly7107]

you'll get no marks if u use =

[@JackCodeKid]

Please help me to balance this: C7H6O2+O2-->CO2+H2O

[@24later1]

it might be
2C7H6O2+15O2=14CO2+6H20

[@janhavikatakdhond2196]

@@24later1 yeah I checked it's correct 👍

[@holdenlinderman5466]

You can not have a half number as a coefficent

[@lolz3577]

Holden Linderman yea beacuse **B O O M**

[@Legendarybesto]

Wrong 4:01 it should be C2h6

[@th86stone]

save MOXNEWSd0tcom youtube channel

[@LiamWebster-h7o]

academy not chemistry lol