De Broglie Wavelength Problems In Chemistry

[@TheOrganicChemistryTutor]

Final Exams and Video Playlists: www.video-tutor.net/

[@randommeep]

for anyone wondering how to get it in meters: 6.626E-34 J*s is equivalent to 6.626E-34 kgm^2/s, which should cancel out units and leave you with meters

[@dianagalindo6149]

I was looking for this, Thank you!!!

[@joshuas4248]

omgggg tysm i was just about to bend over backwards to scour the internet in pursuit of why he got meters

[@deepikagour2938]

Thanks

[@emmaaguilar-torres7510]

thank you

[@tumelonkhabanyane7086]

Thanks for the enlightenment.

[@yasseridris1547]

may I give some advice. Great video first off but I suggest that you write the units for all the values too make it easier to explain.

[@georgesadler7830]

Professor Organic Chemistry Tutor, thank you for showing How to use Broglie Equation in AP/General Chemistry. The problems and examples are simple to follow and understand using the classical De Broglie Equation. De Broglie Equation is another great contribution to Modern Chemistry. This is an error free video/lecture on KZbin TV with the Organic Chemistry Tutor.

[@manchesterfan1012]

General Rule of Thumb: C = wavelength x frequency (v) Energy = h (planks constant) x frequency = h x c / wavelength Da Broglie’s: Wavelength = h/p = h/mass x velocity

[@pintukhan1056]

CzzczczczczczzcczczCzzcczczzcczCzZcZcczczczczczczczczczczzc

[@boha3066]

Yes!

[@travisfarmer1548]

Me here watching the night before my first chem 105 test, The Organic Chem Tutor always comes in clutch

[@royndrosario4690]

you need to use the fact that 1J= 1kg m^2/s^-2 to write Planck's constant as h = 6.626x10^-34 kg m^2/s^2 * s cancel both "s" it will be h = 6.626x10^-34 kg m^2/s

[@Megs-uu7du]

what

[@sooji2406]

i love you and ill remember you forever

[@razasyed575]

we love you the organic chemistry tutor

[@kaileeguthrie5086]

I would like to see the units because I do not understand how they cancel out.

[@edgarfranco367]

I'd love to see the units and they cancel each other and convert to end up with our final units. The main reason I came to watch the video was to see the units worked out because I don't know what to do with the kg.

[@angegogo6198]

Same

[@jerome2354]

Same, I don't know how to get rid of the unit kg.

[@Samylila]

@@jerome2354 remember that Plancks constant is Js. Joules=kg*m^2/s^2. so kg in numerator and denominator cancel out!

[@jerome2354]

@@Samylila Thanks, already got it

[@Samylila]

@@jerome2354 i figured haha but maybe someone else will benefit from this in the future

[@bamlaktadesse4880]

ur videos are perfect; i am gonna have more than good grades cuz of u

[@arabellajennings6058]

I love you man, your channel has helped me so much ahhhh

[@Doktah_Zari]

Remember PEMDAS people, parentheses goes first, then divide. 👍

[@technicalgaur]

You're Awesome....Luv from India

[@KY-xz9yb]

I'm learning this in modern physics, I wonder if there is any difference between how its taught in chemistry and physics.

[@raichu56k]

i'm learning it in physics as well, along with wave-particle duality

[@benjaminhambula9427]

On behalf of everyone. My Jehovah bless you and everything and everyone around you. Am on another continent by yet u are lots of help. Sending Thenks for Zambia 🇿🇲

[@ascaniosobrero]

I have a question for you. In =h/mv if v=0 the relation in meaningless. But I could have a speed low enough to have the object have a visible light wavelenght. For instance, if I weight 70 kg and I move at 1.4 x 10(-29) m/s my wavelenght would be (circa) 663 nm. Does it make sense?

[@barrymuindi3655]

bro you never did a video on schrodingers wave equation and i was depending on you

[@raheemcarridice6008]

Dwl thought I was the only one I was looking so hard I ended up at professor dave instead

[@Perzior]

Quick question, why dont you use f (small letter) for the frequency, would make things less complicated i think with the wohle v and v thing right? Or not?

[@nmarbletoe8210]

f is often used to mean "function" like f(x) = x + 2

[@lizang3533]

For the first problem, why is it m and not m^2?

[@petermontgomery4597]

momentum is mv

[@ale2wavey]

is anyone else getting completely different answers when plugged in??

[@godofnothing428]

In case you didn’t figure it out, you’re just not plugging it properly, try using brackets and/or following pedmas

[@Roust7]

What if the ball is moving very very slow then the wavelength of the ball will increase. So if a ball moves really slow can it go through the wall if its wavelength becomes longer than thickness of the wall??

[@nmarbletoe8210]

yes! try the calculations for a baseball it's amazing. talk about a "change up"

[@yaowang9883]

Shouldn't the last part be double-slit interference to alternate light and dark?

[@elvisgitonga]

I thought so too

[@kirstenholder7270]

Thank you, this was so helpful!!

[@freemanfreeman7145]

Is the de broglie's wavelength a property of spacetime and related to the permittivity or "bendyness" of free space and can explain why the universe can bend/stretch/compress spacetime as with gravity?

[@freemanfreeman7145]

The less momentum it has, so it has less inertia keeping it from being moved around by a of spacetime as it's particle/wave propogates through space?

[@congyu3396]

thank you dude

[@tharun9083]

At 5:30,planck's constant joules is kg m²/s² ,then that wavelength is in meters which will only cancel out the m² in planck's constant,how did the s² got converted to s...making it m/s

[@sonnajensen4824]

What happens to the kg? Why does the final answer only have units of meters? I know it wouldn't make sense to have kg in a wavelength measurement but I thought units only canceled if they were were present in both the numerator and denominator.

[@uhuihiuihiuh3042]

You're right, it's always good practice to show the units in your calculations so you can analyze if your answer makes sense. Recall that the SI units of a joule are kg*m^2/s^2 Therefore the units of Planck's constant are [J*s] = [kg*m^2*s/s^2] The kg in Planck's constant divides out with the kg from the mass and you will end up with an answer in meters.

[@mayank2id]

Solve it with dimensional factor method, you will get only [L], whose Si unit is metre. Hope u like.......;)

[@alaaabubaker8442]

How do u cancel up units ?

[@bece3oo47hirparazeel8]

What is difference between de broglie wavelength and thresholds wavelength

[@manoumanou1661]

@@hayadmya *minimum*

[@fidelshog-oy4845]

What if an electron moving at 1/10 the speed of light ?

[@pablosarriaquezada9357]

Awesome video

[@prestonh7574]

What's about in physics

[@marvievaliente5329]

Thank u💚

[@glizzyxav]

why use v for frequency?

[@amirrezahabibi2479]

If we wanted to find the wavelength of an atom moving at whatever-velocity, how do we find the mass of the Li-7, in kg, to use in the formula?

[@harshbirbrar2830]

Are you taking Chemistry at UBC by any odd chance?

[@amirrezahabibi2479]

@@harshbirbrar2830 haha yep

[@Qwertyfg1234]

You look at the back of ur chirp to find the value of which u multiply The Amu

[@harshbirbrar2830]

@@Qwertyfg1234 godsend

[@raymondbaker987]

Second problem is wrong

[@killaclips9396]

excellent video!

[@Trynnagetmydegree__]

Thanks man

[@henrychileshe9479]

c'est superbe..je l'aime..!!!

[@haripriyaharidas3186]

Tqu so much

[@soumyajitsarkar2372]

can we use E=hf for an electron moving with velocity v ? If yes ,why ? If no,why too ? Thanks for the help :))

[@sajjamokshith1848]

Tqu

[@jordangravon998]

Number 3 is wrong, or you missed a bunch of steps to getting that answer. I ended up with 1.81x10^-10 m*s

[@masonhunt5771]

use parenthesis when entering long equations into your calculator and you should end up with what he says the answer is.

[@robingriffin42]

@@masonhunt5771 Number 3 is wrong

[@priyankaexamprep.2314]

h=6.625×10 power _34 not h = 6.626×10......

[@HayNayyy]

I am just not getting this! When I plug in number 2 I get 4.85 E-23... how do you get the 48.5? Do you just move the decimal over?

[@lapinnain7703]

In my calculator I did (4.85E-11) divided by (1E-12) and I got 48.5

[@exile600]

What is this guys accent?

[@kotosqoposrly]

Nerdian.

[@Mojapane]

😆

[@Trev0r98]

I'm not narrowing it down very well, but his accent is somewhere in the Camden New Jersey - Philadelphia region.

[@noor-dl8wf]

i love you

[@malanalan1]

Your choice of distance units sucks big time.

[@Momentum_animation]

🙃🙃🙃🙃🙂

[@JR1481M1]

uhhh what are u plugging in? You lost me there.

[@tephy21]

He means plugging the values into your calculator

[@4pharaoh]

Waaaat? " I'm just going to replace the speed of light with the general velocity v" ... You can't do that! E doesn't equal mv^2 and E doesn't equal hc ... I'm still looking for someone to make matter waves make sense. Any suggestions?

[@Mathin3D]

FAIL!

[@vishnivinara4423]

in Sri Lanka, we don't get to use calculators for these questions....we use our brains~ ugh.