Calculate the Root Mean Square (rms) Speed of oxygen gas at room temperature

[@SaraNicole613]

It's great how you take the time to explain units! I'm feeling a lot better about this now. Thanks a bunch!

[@micheleberkey]

You are welcome, I absolutely believe in UNITS getting us to the correct answer. :) Glad it helped.

[@netchill5772]

Thank you SOO much!!! This is the only video that actually breaks everything down and makes it easy to understand!:)

[@kagenw]

I actually came here looking for some help in calculating the molar mass of carbon dioxide, but your helpful instructions in your explanation of oxygen were enough to clarify that in my mind. Thank you!

[@micheleberkey]

Fantastic!!

[@yumiogawa8824]

You are the best!!! Thank you so much !!! I found simple way to calculate !

[@micheleberkey]

Thank you and I am SO glad the video helped you! :)

[@simpatiko86]

Explained perfectly by breaking all concepts of units clearly. Thank you very much!

[@micheleberkey]

Thank you! I am a firm believer that cancelling units will always get us to the correct answer! :)

[@7icecube7]

Thank you so much! I have midterms coming up for my Chemistry class in uni and this cleared it up :)

[@Kerwyn204]

finally someone that explained this well! THANK U!!

[@micheleberkey486]

THANK YOU for the comment and dedication to find a good explanation!!! :)

[@micheleberkey486]

For some reason your second question does not show up here.... I am not sure how you could have gotten that answer because that's NOT my first guess, that the square root was not taken.....I enter 3 x 8.314 x 298 then divide by 0.032 - no parenthesis needed since it's all mult/div. Maybe you're putting parenthesis somewhere? So I get 223272 then I take the square root (or raise that answer to the 0.5). :) Hope that helps....

[@albertcuevas323]

You saved my life, God bless you!

[@micheleberkey]

Fantastic!! This calculation has many possible errors along the way that are very easily made. UNITS are always the key (for me anyway). :))

[@nattcattt]

Very clear, no room for confusion. Thank you

[@micheleberkey]

+Nat Cat Awesome!! Thank YOU!! :)

[@Griffinplay]

Thank you! Best explanation on KZbin

[@micheleberkey486]

+Griffin Layne Thank you!! That's a great way to start my day!! Glad it helped!!

[@dom_the3166]

I forget that chemists don't use negative powers in their units

[@JO-ej3nh]

You are amazing, thank you! It is so simple now.

[@micheleberkey]

Thank you for that comment!! The equation can be a bit intimidating, especially if you want to see what happens to all those units. :)

[@sagheerahmad-hw9tq]

I actually need to know, like how to calculate it without calculator,.....😶🙁plz help

[@pooja-nh2lv]

thank you for explaining

[@avishekmajumder8414]

This vid still helpful xD, i got confused in the units of gas constant lel

[@micheleberkey]

So glad the video helped and the units are tricky here! :))

[@GoblinNutts]

Thank You for making this video.. I totally understand how to do it now!

[@micheleberkey486]

+Ricky Gornek That's great to know!! Thanks for viewing. :)

[@epic7906]

Thankyou so much ..without you i cant do my Numericals..i made a mistake on 'C like 100'C. I add it without change it in Kelvin like i should do this 100 + 273 = 373 ..Now i know my mistake because of you ...Thankyou So much ..You are Great ..Keep it up Mam..From Karachi,Pakistan

[@micheleberkey]

Greetings to you in Pakistan!! I am glad the video was helpful, most equations require specific units, and as you are probably aware, many units have other units hidden in them. Using units is SO important in getting the correct answer in cases like this. Thank you for the comments and keep up the studying. :)

[@epic7906]

Michele Berkey Thanks mam

[@manomanomano1697]

A bundle of thanxxxx ma'm...m so happyyyyyyyy

[@janvigupta558]

thanku so much : )

[@micheleberkey]

You're so welcome! :)

[@auravstomar7629]

Hey there ! Nice video. Could you please explain why we can't use the other R = 0.0821 ?? I'm somewhat confused...

[@micheleberkey]

Hi & thank you. The R value of 0.0821 has units of Liter x atmosphere in the numerator (which does work out to an energy unit, Energy being Force x distance). Converting Liters to meters^3 and since pressure is Force/area (m^2), the result of V x P = Force x meter. But for your specific question, since units must always cancel only leaving the appropriate unit(s) of the value in question, the R value of 8.314 is uses because its numerator is not L x atm, but rather Joule (J) and the Joule unit is a unit of force (Newton) x meter. And a Newton is a combination of units. In physics mainly, you'd see force units a lot, and Newton's first law of motion is that a Force = mass x acceleration, mass in kg and acceleration is the change in velocity per second, so has units of m/s per second, which becomes m/s^2. In my opinion, all problems to be solved come down to determining the units for what is asked for, and then making sure all other units cancel. The equation for the rms speed will give the speed in m/s only if Joule is present. Hope that helps!

[@ManzilSafarAurBaateinOfficial]

Why some times they Multiply the given mass with proton mass???

[@micheleberkey]

Sorry I did not see this and I don't have an answer for your question unless it's the speed of a hydrogen atom?? Then Boltzmann's constant would be used instead of the R value - just throw out a hand waving possibility??

[@WhoPlaysMc]

Perfect explanation.

[@micheleberkey]

Thank you, I hope it cleared up any confusion. :)

[@Dodeforel]

Great video, thanks. :)

[@micheleberkey2364]

Thank YOU!! :)

[@sidxaener5455]

god that pencil is so satisfying !

[@micheleberkey]

LOL, isn't it though?? 0.9 mm lead, I'd use 1.8 if it was available!! :)

[@sidxaener5455]

hope u'd use 1.8 in your next videos lol

[@bobgut4384]

Thaaaaank Yoooou!!! your the best :D

[@micheleberkey486]

+Bob Gut Thank you Bob for the kind comment! I am very happy it was helpful. :)

[@mdaishakhan9319]

hii can you are from where and which college you are going say and which country

[@dannylee981]

life saver

[@micheleberkey]

So glad it helped you out! :)

[@berroairesp.4509]

A bunch of thanks❤️

[@ImJustStandingHereMenacingly]

GOD BLESS YOUR SOUL

[@micheleberkey]

THANK YOU!! :)

[@sam_3054]

what if its in NTP and not at 25 degree will it still be the same? or 25 degree is NTP itself?

[@micheleberkey]

Hi Sammy: The oddest thing to me is that NTP Temp is 0 Celsius not 25 Celsius (298K) as most tabulated data is. So when the temperature is NOT 273 K, the ideal gas law would need to be used with 298 K.

[@onetapserve2143]

I love ur pencil 😂😂😂✌🏻Thanku for the explanation

[@micheleberkey]

Thank you - I love it too! 9.0 mm lead!! And you're welcome, thanks for the view! :)

[@starshipengine]

Thanks for the Great video. could you please help me figure out a formula for the speed of oxygen, when its under a pressure difference.. flowing through a pipe, or a hose. I think have density figured for 293.2 degK .. and a pressure drop of say 10Bar. How can I add a pressure change into the equation.. if that makes sense

[@micheleberkey]

Hi and thank you for the view! I've contemplated this for a bit and cannot figure out how to approach this at a different pressure. If the pressure increases (and the gas is in a sealed container like a pipe), then that would increase the temperature of the gas, using PV=nRT, since oxygen behaves in an ideal manner. I'm not sure how to incorporate that into the formula for the rms speed, maybe delta P x V = nR delta T? and increase the T in the rms formula by that amount??? Great question, sorry I have no answer.... :)

[@moeedbaloch9581]

Can you solve it MKS system

[@TheArnoldification]

So basically PatrickJMT but not at sanic speed. Huh.

[@SkyeKing]

One oxygen atom does not weigh 16 grams silly! One mol of oxygen (6.02*10^23 oxygen atoms) weighs 16 grams. Otherwise, this is an excellent explanation!

[@micheleberkey]

I SOO stand corrected!! Thank you!! :)

[@JO-ej3nh]

She kinda stated that the 16g of oxygen represented the molar mass which is correct. She also state that the mass would have the units of g/mol so she was still correct technically speaking. :)

[@micheleberkey]

And thanks for 'sticking up for me' LOL. ;) I get lazy in my speech at times.....

[@andrewmelcher450]

It's a common mistake not to convert to kg

[@micheleberkey]

Yes, for the students who have NOT taken physics, this often causes an error. :)

[@shubhambhatt5241]

Thanks

[@melftheelf]

thank ms berkey

[@micheleberkey486]

+Fed You are welcome Fed. :)

[@mdaishakhan9319]

hii please say me you are which country and which college are you going to say and please say me your college an country because I am going to apply study visa for forgen please can you suggest me a better country and college for study and your chemistry is excellent

[@shadabbasir5224]

rms ko mks system m kesy calculate kry?

[@RiggyRonnie]

Thanks so much I feel enlightened and more confident. I wasn't there the day my physics teacher went over all of this

[@micheleberkey]

Fantastic! Confidence is crucial and enlightenment is even better! Thanks for the view and comment. :)

[@sam_3054]

thanks

[@TheJadeScarab]

Thanks :D

[@micheleberkey]

+LostRepublic You're welcome. :)