Mr. Causey I want you to know that even though I have been struggling with my chemistry class all semester your videos have helped me so much. You have videos for each section of my basic chemistry class. What is difficult to learn in class you have made so easy and obvious and for that I want to thank you. I have given your information to my lab partner who has been struggling, also. I am sure that we will be more confident for our next and last test prior to our final. The test will be on Avogadro's number, empirical formulas, mole ratio. Anything and everything from our textbook chapter 6 & 8 Chemical quantities and Chemical quantities in Reactions. From:The Pearson Custom Library for Chemistry MCC: Basic Chemistry: CHM 010 Fall 2013 Timberlake/Sherman. Our final will be cumulative. I know where I will be in preparation for both exams. Thanks again.
@mrcausey9 жыл бұрын
Thank you for the feedback and for watching.
@TheRok8 жыл бұрын
For people revising this, important stuff starts at 1:20.
@mrcausey11 жыл бұрын
It depends on your teacher. I use the numbers to the .01 place value some like three decimal places. As far as learning chemistry it doesn't matter. The three most common values for hydrogen: 1.0; 1.01; 1.008
@patriciahelsel38539 жыл бұрын
I LOVE YOU MR CAUSEY.........
@robertlewisvazquez12 жыл бұрын
You had the history of the experiment which I didnt know and you explained the procedure clearly and great. Amazing Video!!! I applaud your work.
@DeeDeeFatmLoverWanab8 жыл бұрын
using these vids to help study for my exams haha thank u !
@2244london9 жыл бұрын
Thank you
@shannonsamlal994510 жыл бұрын
THANK YOU VERY MUCHH !! You are an excellent teacher
@sweetnsoursassy9 жыл бұрын
24.3 of magenisum represents how many moles/
@tanwongsanganan55257 жыл бұрын
This video helped me with chemistry last year and also physics in this year! Thank You!!
@mrcausey7 жыл бұрын
You're welcome ! Thanks for the shout out!
@alexandercedeno10 жыл бұрын
Thanks for this. I feel more confident on my understanding of all this.
@loshm2611 жыл бұрын
GrEaT HeLP!!! thnx alot:-)
@lavanyagarg93 жыл бұрын
Sir is it compulsory to use 1.01 for any molecule for finding amu...
@mrcausey3 жыл бұрын
No. The 1.01 amu is hydrogen. The atomic masses on the periodic table have already been determined and you can use that same number for the molar mass just change the units to grams.
@SiddhantTamang10 жыл бұрын
So when i have to find the mass of some liquid of lets say 100 ml then i have to divide the molecular wt. of the liquid by 22.4 and multiply it by 0.1??
@andrewhariyanto31328 жыл бұрын
Question #1: Mr. Causey, so any atomic mass unit that is multiplied with 6.022*10^23 is the atomic mass unit of the atom with grams, right? Question #2: Can you show me how to solve for how many breaths it will take to burn the energy from a particular amount of sucrose in grams?
@mrcausey8 жыл бұрын
How much O2 is in each breath? It's not really a straight forward problem, because sucrose has to be broken down to glucose to use in respiration.
@mrcausey8 жыл бұрын
Any elements mass in grams is a mole of that element.
@andrewhariyanto31328 жыл бұрын
Oh ok, thankss. That clears everything up
@sharpskilz11 жыл бұрын
My periodic table shows atomic mass to more places i.e Hydrogen is 1.00794 should I be using a simpler table??
@MidnightMusic1411 жыл бұрын
Thank you so much! I was having trouble with this :P
@watashigakita7169 жыл бұрын
Thank you sir. helped me a lot
@mrcausey11 жыл бұрын
You are welcome!
@divneet34749 жыл бұрын
In the reaction 2H2+O2=2H2O. How many moles of oxygen are present ? Will we take the 2 of oxygen into account for determining the moles?
@jessicaanderson46811 жыл бұрын
Do you use the microphone on your computer or an external one? Also, what program do you use to create the videos you make? They are great! I am just starting out in creating online courses :)
@soigsige8711 жыл бұрын
I don't get it. 12amu C is equal to 1amu H then 1 g = to 1 amu...so C12 is equal to 12 grams but 1 MOLE of C12 is equal to 6.022X10^23?? is not supposes to be 1 C equal to 1 MOLE then 1 MOLE of C12 will be equal to 12*Avogadro number ?
@a71m2812 жыл бұрын
My science teacher introduced this video to us and it was really helpful for me. Thanks! :)
@salimkamil201211 жыл бұрын
Thank you very much But my question how did this number where deduced, i mean the calculations that lead to this number? Thank you again
@shylakate9811 жыл бұрын
Thank you studying for finals like a baus!!!
@ufatemav450910 жыл бұрын
Please tell me if Im right: In order to find out the particle, atom, molecule or formula units we must use Avogadro's number
@darrellcauseyjr.859510 жыл бұрын
Yes, the moles times Avogadro's number is particles.
@ufatemav450910 жыл бұрын
Darrell Causey Hmm...thanks! But then how do we find the atom, molecules or formula units? I have my Physics exam in 6 days!!
@darrellcauseyjr.859510 жыл бұрын
Urwa Fatema Veerji moles of an element times Avogadro's number is atoms moles of a covalent compound times Avogadro's number is molecules moles of an ionic compound times Avogadro's number is formula units
@ufatemav450910 жыл бұрын
Darrell Causey Oh Thank you so much! This was much simpler. Now I understand it!!!! THANKS
@xXBatmanGamingXx9 жыл бұрын
Love ur Videos man u the real MVP
@mrcausey9 жыл бұрын
xXBatmanGamingXx Thank you! Thanks for watching!
@lizakovacs93398 жыл бұрын
does anyone know how to calculate the moles of water in 249.6g of hydrated copper sulfate? pls someone answer
@amairanihuidobro11 жыл бұрын
What do you do with something like this Ca(OH)2
@rhodyparrish22636 жыл бұрын
Theres an error at 6 minute mark. If you replace the AMU with grams it would equal 40.08 grams not 4.08
@mrcausey6 жыл бұрын
Ahh yes. Wrote it right said it wrong. Happens in class too. Thanks for watching!
@mdbrewer0712 жыл бұрын
Great video. I'm in physics II and it's been a while since I took chemistry. This video helped a lot. Thanks.
@madminder2111 жыл бұрын
This really help :)
@morsmb111 жыл бұрын
ty
@farhanawan9348 жыл бұрын
How many Oxygen atoms will be if HNO3 contains 0.5g of Hydrogen??? plzz answer this question..
@mrcausey8 жыл бұрын
+Farhan Awan First notice that the formula tells you there is 1 mol H to 3 mol O. .5 g H /1.01 g H = .495 mol H .495 mol H x 3 mol O = 1.49 mol O 1.49 mol O x 16.0 g O = 23.84 g O
@johnslee53109 жыл бұрын
where is the 1 mole come from?
@mrcausey9 жыл бұрын
johns lee The mole is a number the same way a dozen is a number.
@ChDanial8186 жыл бұрын
you are ausome
@mrcausey6 жыл бұрын
Thank you for commenting, it is greatly appreciated.
@sweetnsoursassy9 жыл бұрын
Istill dont get it.
@kentheengineer5924 жыл бұрын
this person needs to provide you more information and direct references regarding the original publications for the statements that are being mentioned in the video very frustrating i know
@crsini52013 жыл бұрын
Thanks, very helpful
@jess1dreamer12 жыл бұрын
Great video.
@kaylasmith690912 жыл бұрын
Thank you so much its so easy to get now :D But I was just wondering, how did avodgadroo actually conclude the number of 6.002x 10 to the 23? Thanks :D
@nkhoo012 жыл бұрын
thank you!
@miguelbartholomew34967 жыл бұрын
question #1 How many chlorine molecules are there in 350g of chlorine gas.
@mrcausey7 жыл бұрын
Remember chlorine is diatomic Cl2, so you have to to double the mass - 70.90 grams per mole. Now divide 350 by 70.90 to get the moles. Then multiply by 6.022 x 10^23
@corey4958 жыл бұрын
That moment when you are here just for fun. Chemistry is fun and exciting, but instead of AP Chem I took AP Physics 2.
@twinkletoes12512 жыл бұрын
Thank you, I will bookmark this until I remember! =)
@kentheengineer5924 жыл бұрын
you know what here's what i don't understand how come the original person who name these concepts don't teach it themselves let alone leave it up to someone else to do the job
@mrcausey4 жыл бұрын
Well, not just one person is responsible for the development of the mole concept and Avogadro's number. It developed like most scientific concepts over several years with contributions from many people. The mole is just a representation of a number like a dozen is a representation of a number. However, using the for stoichiometry makes calculations easier and more manageable. BTW all the people involved in the beginning are dead.
@grimmitachi9 жыл бұрын
so 1 mole = atomic mass?
@mrcausey9 жыл бұрын
No, the atomic mass in grams is one mole of that substance thus the molar mass. Remember, hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine and iodine are diatomic elements.
@julliannegelalmodovar63289 жыл бұрын
Mr. Causey therefor, diatomic elements has 2 moles?
@mrlogicalism47998 жыл бұрын
stop pressing space all time
@3011remaerdyad11 жыл бұрын
WHOOOOOOOOOOOOOOOOOOOOOOA!!! Studying Finals like a boss!
@mrcausey11 жыл бұрын
that's one mole
@ryanhale79047 жыл бұрын
he sounds like idubbz
@crystalgrose10 жыл бұрын
WHY IS CHEMISTRY SO COMPLICATED?
@mrcausey10 жыл бұрын
It's not! It's quite systematic. But, it does require work.
@crystalgrose10 жыл бұрын
I just can't seem to get it. I've taken Chem 2 twice and may have to take it over a 3rd time. That light bulb just won't come on for me Mr. Causey.