Avogadro's Number, the Mole and How to Use the Mole

[@jiamiamom]

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.

[@mrcausey]

Thank you for the feedback and for watching.

[@TheRok]

For people revising this, important stuff starts at 1:20.

[@mrcausey]

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

[@patriciahelsel3853]

I LOVE YOU MR CAUSEY.........

[@robertlewisvazquez]

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.

[@DeeDeeFatmLoverWanab]

using these vids to help study for my exams haha thank u !

[@2244london]

Thank you

[@shannonsamlal9945]

THANK YOU VERY MUCHH !! You are an excellent teacher

[@sweetnsoursassy]

24.3 of magenisum represents how many moles/

[@tanwongsanganan5525]

This video helped me with chemistry last year and also physics in this year! Thank You!!

[@mrcausey]

You're welcome ! Thanks for the shout out!

[@alexandercedeno]

Thanks for this. I feel more confident on my understanding of all this.

[@loshm26]

GrEaT HeLP!!! thnx alot:-)

[@lavanyagarg9]

Sir is it compulsory to use 1.01 for any molecule for finding amu...

[@mrcausey]

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.

[@SiddhantTamang]

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??

[@andrewhariyanto3132]

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?

[@mrcausey]

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.

[@mrcausey]

Any elements mass in grams is a mole of that element.

[@andrewhariyanto3132]

Oh ok, thankss. That clears everything up

[@sharpskilz]

My periodic table shows atomic mass to more places i.e Hydrogen is 1.00794 should I be using a simpler table??

[@MidnightMusic14]

Thank you so much! I was having trouble with this :P

[@watashigakita716]

Thank you sir. helped me a lot

[@mrcausey]

You are welcome!

[@divneet3474]

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?

[@jessicaanderson468]

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 :)

[@soigsige87]

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 ?

[@a71m28]

My science teacher introduced this video to us and it was really helpful for me. Thanks! :)

[@salimkamil2012]

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

[@shylakate98]

Thank you studying for finals like a baus!!!

[@ufatemav4509]

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.8595]

Yes, the moles times Avogadro's number is particles.

[@ufatemav4509]

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.8595]

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

[@ufatemav4509]

Darrell Causey Oh Thank you so much! This was much simpler. Now I understand it!!!! THANKS

[@xXBatmanGamingXx]

Love ur Videos man u the real MVP

[@mrcausey]

xXBatmanGamingXx Thank you! Thanks for watching!

[@lizakovacs9339]

does anyone know how to calculate the moles of water in 249.6g of hydrated copper sulfate? pls someone answer

[@amairanihuidobro]

What do you do with something like this Ca(OH)2

[@rhodyparrish2263]

Theres an error at 6 minute mark. If you replace the AMU with grams it would equal 40.08 grams not 4.08

[@mrcausey]

Ahh yes. Wrote it right said it wrong. Happens in class too. Thanks for watching!

[@mdbrewer07]

Great video. I'm in physics II and it's been a while since I took chemistry. This video helped a lot. Thanks.

[@madminder21]

This really help :)

[@morsmb1]

ty

[@farhanawan934]

How many Oxygen atoms will be if HNO3 contains 0.5g of Hydrogen??? plzz answer this question..

[@mrcausey]

+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

[@johnslee5310]

where is the 1 mole come from?

[@mrcausey]

johns lee The mole is a number the same way a dozen is a number.

[@ChDanial818]

you are ausome

[@mrcausey]

Thank you for commenting, it is greatly appreciated.

[@sweetnsoursassy]

Istill dont get it.

[@kentheengineer592]

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

[@crsini520]

Thanks, very helpful

[@jess1dreamer]

Great video.

[@kaylasmith6909]

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

[@nkhoo0]

thank you!

[@miguelbartholomew3496]

question #1 How many chlorine molecules are there in 350g of chlorine gas.

[@mrcausey]

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

[@corey495]

That moment when you are here just for fun. Chemistry is fun and exciting, but instead of AP Chem I took AP Physics 2.

[@twinkletoes125]

Thank you, I will bookmark this until I remember! =)

[@kentheengineer592]

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

[@mrcausey]

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.

[@grimmitachi]

so 1 mole = atomic mass?

[@mrcausey]

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.

[@julliannegelalmodovar6328]

Mr. Causey therefor, diatomic elements has 2 moles?

[@mrlogicalism4799]

stop pressing space all time

[@3011remaerdyad]

WHOOOOOOOOOOOOOOOOOOOOOOA!!! Studying Finals like a boss!

[@mrcausey]

that's one mole

[@ryanhale7904]

he sounds like idubbz

[@crystalgrose]

WHY IS CHEMISTRY SO COMPLICATED?

[@mrcausey]

It's not! It's quite systematic. But, it does require work.

[@crystalgrose]

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.

[@johnrieldejesus8713]

huh?...

[@mrcausey]

Try this one kzbin.info/www/bejne/r3rad6R_qZiBh9E

[@mohammadtaahaarashid5575]

tatti! thank you!

[@Born2bthuggin]

moles have nothing to do with guacamole XDDD

[@darrellcauseyjr.8595]

Really, darn!

[@theytwatcher950]

Darrell Causey Darrell seriously!!!

[@mksxo4]

.....i love you

[@Kaughphie]

What? Nothing to do with guacamole? Rats.

[@waleedeed591]

Thank you

[@mrcausey]

You're welcome.