Formula from Mass Composition

[dirk0389]

This video saved my life.

[7RaPeKiNg7]

8:38 wait, can someone please explain to me the part where he says for every Hg there is 2 Cl? i dont get where that comes from. lets say theres 100g of things and 50g is Hg and 50g is Cl then Hg would be .25 mole and Cl would be 1.4....

[MediumNothinFull]

it's 6:46 notes all through the night,

[TPBHvideos]

his voice keeps me interested...

[goldensilverstar]

His bag has fucking everything

[shawdabest]

@goldensilverstar I know and his arrows look like penises

[goldensilverstar]

Khan can u make curry appear out of this magic bag of yours too?

[soopa123]

what the fuck... i dont understand any of this, why whould you DIVIDE 200g by 75? i graphically dont understand

[thespartan95]

Noooooooooooooo the caculator is gone :(

[Raquel222010]

This is amazing. Thank you for helping me (hopefully) not fail another test. Please come teach here at UMM?

[rafaeldelaflor]

is there some coincidence you always start out with getting things in bags?

[Zander101084]

I'm preping for HL IB chem, having never taken chem before. I'm just going through these videos one after another and it's like taking a year of chem.

[Hemouth]

took me 3 days of googling/wiking and doing exercises to understand this

[TheRockinngabhishek]

i just kicked my tutor becoz u r better then HIM!!!!

[rogue1231000]

You make my life so much easier. thank you soo much for doing these :)

[rAchellelyn08]

Ha? what if the mass of the bag you're saying is... 120 not 100g i don't get it

[Zetek04]

@rAchellelyn08 true if he would chose a different value for 100 it would be easier to get it :/

[monikaable63]

can you do this with a compound?

[rAchellelyn08]

What if the 100g is 120g??? how will you know ho much HG g are there?

[monikaable63]

@rAchellelyn08 You look at the "mass" of that element in the periodic table

[MisstressOfNight]

your voice is so sexy. it sounds like penn badgely!

[KrajeskisRule]

I learn more chemistry through Youtube than I do in my college classes >.< Thanks!

[SuniteLauchande]

As you are using 100grams... if the exam question gave you a total of something like 150grams would you still use divide normally like you have?

[rgpfighter]

this helped me so much and i used it to study for my test.. thanks for the great videos

[popachris101]

ur arrows look like penis, other than that this has been helpful

[polamalulookalike]

your vids as you already know are the best ill be forever ahead of my class thank you

[polamalulookalike]

your vids as you alredy know are the best ill be forever ahead of my class thank you

[smgonz]

Thank you... I passed my test because of your videos! Thank You !!!!

[manshet1]

you know that you are good at teaching. thanks a lot!

[patricia11ize]

thnx 4 this video..now my mind is enlightened and im  ready to take the quiz tomorrow about moles.... :)

[bevon17]

WOOT I GET IT

WIN WIN WIN

[MrAngelinam]

do you have o chem

[ellpapidomi28]

hey sal can you do a video about dimensional analysis

[MrAngelinam]

thank you I think you. I wished you were my teacher in collage

[Divjot04]

Instead of assuming 100g , can we assume 100amu , i guess it will the procedure faster...

Correct me if wrong

[Divjot04]

@Divjot04 it will *make* the procedure faster

[EternalxTwilight]

thankk you soo much for the videos! they're really easy to follow and REALLY helpful! :)

[anuwala]

i am notttttt really sure

[ebonyamberjade]

You DON'T have a bad memory!!!! You are a genius.

[furbyoats]

needs to be an edit on the very last worked problem. easy mental slip up...but if there were .375 moles of Mg and .72 moles of I, then the empirical formula should be Mg(sub 2)I...since it is roughly 2 Mg to equal 1 I.... just wanted to make a note of that. This guy is an amazing teacher...no complaints from me :)

[zyxwvutsrqponmlkh]

"some mercury out there has a mass of 201" the truth is that only some mercury has a mass of 200 most of it has more or less.

[heymissyk]

I get it!! My teacher gave us this way confusing formula to figure this out but this is so easy!

[geordievb]

really great stuff, these vid's are a life saver! (Y)

[ragsag211]

your great thanks alot with ur videos

[xxkora]

Sal, I love all your videos. They've been very helpful, thank you so much. If I could request one thing related to this topic is mass to mole conversions. For example, how do you solve a question such as: What amount of substance is present in 100g of NH3(g)? Again, thank you!

[eckosama]

there is 100 g of substance lol jk idk

[RustyL121]

Use Moles = Mass/RMM

Moles = 100/(14+(1x3)) = 100/17 = 5.88 moles

[Denseworldproduction]

@xxkora NH3's molar mass is 1x14.01g/mol 3x1.01g/mol <<found on periodic table ----------- 17.04g/mol n=m/M M=17.04g/mol m=100g n=100g/17.04g/mol n=5.87mol i think thats what your asking for =)

[Whopzer]

Does it matter which way you write the formula? Can you write it I2Mg instead of MgI2? Thanks.

[Blarg247]

Yes, It matters very much. I2Mg would indicate a molecule composed of Two Iodine Atoms and one Magnesium Atom, whereas Mg2I would be the opposite.

[Whopzer]

I think you missunderstood me. I didn't ask for I2Mg and Mg2l, I asked for I2Mg and MgI2...

[Blarg247]

As I understand it, altering the position of a quantity of atoms within the formula, for instance, l2Mg versus Mgl2 would not change the formula's meaning. Thus,

l2Mg = Mgl2

[Whopzer]

Okay, thanks :)

[LordAlda]

It's still a bit difficult to remember the first time through. Great flow though, it's very easy to flow.

[ARMOROID5000]

Very good video.

I like the way you have an easy going manor which makes it easy to understand what you are teaching.

This will be great for my son whom I am going to be home schooling this year.

Thank you for the effort your expending on these videos. 5/5

[Nani101]

@ARMOROID5000 I hope you'll teach your kid the proper usage of "your" and "you're"??

[unlaughable]

@Nani101 he didn't use them wrong.

[unlaughable]

@Nani101 sorry you're right. i read his sentence wrong.

[Aloboli]

@ARMOROID5000 maNNEr. you need to take spelling lessons instead!