How to Convert Units in Chemistry

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If unit conversion has never made sense to you then please watch this video. I'll explain the concept of unit conversion and do multiple examples explaining the metric system, dimensional analysis and Stoichiometry. Plus I have a few Chemistry tricks that I'll teach you in this video.
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Опубликовано:

9 авг 2020

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Комментарии : 144

@mujigau 3 года назад

The fact that you're explaining this better then my current chem teacher says A LOT 👁👄👁

@jordynf2881 3 года назад

Pro tip: memorize common molar masses, like water being 18.016g or oxygen being 16.00g. It'll save you calculations later on!

@aaliyeah5071 Год назад

Good trick! 😊

@AdedokunAdebo Год назад

Agreed!!! 😂

@lynesedoukoure5573 3 года назад

Hi Melissa, I just started Chemistry and I am CLUELESS. I have been watching your videos and taking intense notes because you seem to make it more easier to study. This is my first year and my degree choice demands Chemistry and Biology courses. As bad as I would like to withdraw... I cant. I want to face the music because I have no other option. Thank you for what you are doing to assist and Please give me as much valuable Beginners information as possible. You cant move forward with this couse until you understand the Basics. Thanks and Many Blessings

@cerealis_5432 2 года назад

what is your major and what grade did you end up getting? I enjoyed biology in high school but always found chemistry more challenging.

@caution2445 2 года назад

I'm in the same boat! I feel so much dumber than everyone because it feels like I'm alone :/

@XxAlex530xX 2 года назад

Did you pass?

@jazzytea123 6 месяцев назад

did you pass?

@crashawaker8890 3 года назад

Nah I really love you 💙I’m not learning shit in my class thank you 😊

@sendesalbahathly3130 3 года назад

Same

@anabelellison4006 2 года назад

fr tho

@ethandehantschutter7003 3 года назад

Your stoichiometry unit conversion explanation is phenomenal. I had no idea that the purpose of multiplying what you presented, was solely for unit conversion. Seriously , seriously helpful stuff. Thank you, +1 subscription.

@melissamaribel 3 года назад

Yay! So glad it is making more sense now :)

@eeeeemeeee9047 3 года назад

But how are you getting the exponents?😪 Where did the 7 come from?

@martinconnelly1473 3 года назад

1/10^-2 is 10^2 515 is 5.15 x 10^2 you have the kilo part giving 10^3 adding together the positive powers of 10 you have 10^(2+2+3) = 10^7 so the result is 5.15x10^7. There were two steps jumped in this conversion. One was that the 10^-2 under the line was changed to 10^2 above the line, the other was that 515 was changed to 5.15 x 10^2 . This was done to get the final result in standard scientific notation of a single digit before the decimal point and the powers of 10 all combined into one power of ten. Hope this helps.

@makaituipala2854 Год назад

I’m really lost where the extra ^2 is coming from. We have 10^3 then 10^-2 which is then changed into 10^2 for whatever reason. But still 2+3 is 5? Where is the extra 2 coming from??

@andrefitnessvlog6231 Год назад

@@makaituipala2854 In the conversion of decimal points, 515 in every 1 decimal point moved into the left, they were 1 power add to the positive powers. However, in this example it was moved 2 decimal point in the left to become 5.15, since it moved 2 times then 2 powers will be added to the positive powers, so, it will become 10^5, the 10^3+ 2positive powers= 10^5 see the difference, after that you'll add the other 10^2 because we only add the 2powers to the 10^3 that's why it becomes 10^5. So, 10^5 + 10^2 = 10^7 that's where was 7 fuc*ing came from☺️

@makaituipala2854 Год назад

@@andrefitnessvlog6231 thank you Andre Fitness Blog. Love to see young kids starting their fitness journey! Remember the first 2 weeks are the hardest don’t quit!

@j.chrismcgaugh5124 Год назад

This is absolutely brilliant. I taught physics for 25yrs...Unit conversion can be a bear, indeed for freshmen. What a GREAT idea you have with converting languages. Absolutely the best precursor illustration I've seen. Way to go, Melissa!!!

@officialkreativek 3 года назад

Hello, Melissa. :) I am a freshman in college, and my major is going to be chemistry and a minor in biology! I've learned all of this, but I COMPLETELY forgot how to do it. Your video SAVED me today! Thank you!!!! :)

@alessam6912 Год назад

subscribed! I've never seen anyone explaining this better

@klr1572 2 года назад

can someone tell me at 5:08 how it becomes 10^7 as the answer? I'm not understanding how to get the right 10^.

@briannacernadas9828 2 года назад

Thank you. You are a QUEEN. You help me more than my chemistry professor does, some people teach better than our professors/teachers. I can speak for many people in the comment section that we are so grateful for your videos, some of these topics seem like another language or totally out of reach in lecture but you help me see how easy and simple some of it can be. I'm confident in this semester all thanks to you!!!

@connornichols2248 3 года назад

Right in time for the start of my 151 class👍🏻

@ananya583 3 года назад

Beautiful Illustrations ❤️❤️

@giovannaalessio Месяц назад

Thank you!!!! you helped me a lottt

@spirituallyenergized 3 года назад

Thank you Melissa you're the best!

@syedmohammed4608 3 года назад

❤️😍

@_rae 3 года назад

this is sm help, thank you

@barakahdugan8741 Год назад

how did you get 10^7 on the km to cm?

@dddaaa6965 5 месяцев назад

If someone else in the future doesn’t understand. 515 x 10^3 x 10^-2 = 51500000. Then to convert it to scientific notation you move the . seven places to the left 5.1500000 5.15x10^7 Hope this helps someone!

@dddaaa6965 5 месяцев назад

Oops I meant to write divided by 10^-2 not multiplied

@aiyanahakopian7912 5 месяцев назад

thank you so much this saved me!!

@sonialeon1115 Год назад

your a life saver I love your videos

@dreamampm8679 2 года назад

The amount of work here is just amazing ...Thank you

@alexandriawellman8601 5 месяцев назад

I wish my professor explained it this way!

@alejandrag.639 Год назад

Your video has saved me 🙌

@siuyung3404 2 года назад

Just starting my Chemistry class. your video saved me!!!! thank you !!!

@lauren9004 7 месяцев назад

Thank you!

@dddaaa6965 5 месяцев назад

Omg I finally get it…I spent like 3 days on this was my second roadblock after having to memorize polyatomic ions, but I spent a day repeating the -ites in my head and memorized the rest and just repeating them really fast every now and then during the day.

@Lkn6789 2 года назад

Melissa I genuinely wouldn't know what to do if you didn't make a youtube. I always find myself saying "that's it?'" and really engaged in learning. Thanks againn

@melissamaribel 2 года назад

Yes that's it haha Love it!

@Mikeh404 2 года назад

The 2nd half part make so much sense! I even write it down to a flash card. Thank you.

@esterfigueroa7952 Год назад

Thank you so much

@kyleelangevin3671 2 года назад

THANK YOU

@lindasulpacio5737 9 месяцев назад

You are best! Taking Chemistry I for the 3 rd time.

@pockettes3918 3 года назад

Hi Melissa I'm so thankful for your study guides and this wonderful learning playlist + practice problems you have provided! I was taking Chem 101 last spring but had to drop it because A. Covid happened B. My chem teachers was absolutely terrible! I'm starting a summer Chem class (this time at a new University) and I'm so thankful for all the work you've done! There are so many concepts I remember being exposed to in my Chem 101 class that I barely understood but through your videos I understand perfectly. Your method of teaching, integrating practical problem solving, and just being clear and concise with your instruction is exactly what I needed in this moment. Keep up the good work! You're helping more than you realize ^_^

@dorisicia19 3 года назад

@Melissa what are the names of the notebooks you are using I could use them for note taking. Thanks

@neverything4402 Год назад

So helpful

@user-hr4ty9xs6y 9 месяцев назад

I had my first test last night. i wish I found this video sooner 😮‍💨

@iMaGiNaTiOnWpAsSiOn 3 года назад

At 5:13, how did you get 10^7 cm? Is there a way you can show the actual math part? I think that’s where I’m struggling. I have the set-up, but don’t understand how to multiple 515 X 10^3 divided by 10^-2

@nicoleramirez5296 3 года назад

you have to go back to her exponent rules. Rule 2: When bases are the same and are being divided, subtract exponents. so you have 10^3 and 10^-2. Subtract 3 from -2 to get 5, so 10^5. Then the problem reads 515X10^5. You have to move the invisible decimal at the end of 515 over 2 spaces to in order to write the problem correctly, and how ever many spaces you move, you add to the exponent, so 2 space plus the 5 in the 10^5 and you get 5.15 x 10^7. Hope I wrote that easy enough

@derekpoulin3553 3 года назад

@@nicoleramirez5296 thank you, I was struggling with the same thing.

@dessmund5001 Год назад

@@nicoleramirez5296 what do you mean the bases are being divided?

@davidegbe8262 5 месяцев назад

Awesome!

@chevonjackson 3 года назад

Hello Melissa! Thank you so much for this channel.

@tatyanapresny3540 9 месяцев назад

Hi Melissa, your videos have been so helpful to me with studying! Thank you so much! I do have a problem that I cannot solve and was wondering if you could help me. The problem: Radio waves travel at the speed of light, which is 3.00x10 8 m/s. How many kilometers will radio messages to outer space travel in exactly one year?

@KarleeR 3 года назад

I don’t understand how you get the end answer

@sabrinam2804 2 года назад

same??

@fxckinglollipops 3 года назад

My attention span loves the visuals

@bighitcrackheads9360 2 года назад

I just recently saw your videos and it helps me a lot Melissa. Thanks to you and I will recommend your tutorials to my friends.

@dddaaa6965 5 месяцев назад

I love this video

@claudialoverap Год назад

You just won a new subscriber thank youuuuuuu

@melissamaribel Год назад

Woo hoo!! 🎉

@natalymarji8033 Год назад

Thanks!

@melissamaribel Год назад

Thank you for your support ❤️

@danloyer6241 2 года назад

This tutorial on Unit Conversion is very good, I have taken math and chemistry, is pretty much or very similar what I was taught an excellent resources for sure

@linshu9847 2 года назад

Our teacher said that we are going to study chemistry next quarter, she advised us to look for conversion units. This is a big help. Thank you ☺

@alaaalddd4326 3 года назад

Ty for helping me in studying ❤️❤️❤️

@mels401 3 года назад

this is so helpful thank youu!

@martinconnelly1473 3 года назад

The only length conversion you need to memorise is 1" is 25.4mm, all other conversions are calculated from this. When the 1914-1918 war started the USA and the UK inch were different lengths, one slightly more than 25.4mm and the other slightly less. A Swedish company belonging to a man called Johansson was the only company making gauge blocks. When the USA and UK needed gauge blocks for their war efforts he decided that, rather than make 2 different inch sizes, he would fix the inch at 25.4mm. Later Henry Ford started using these same blocks as well so the USA inch and the UK inch both became standardised to be a set SI size. So all USA inches, feet, yards and miles are based on the inch being 25.4mm. The USA inch before this was 25.4000508mm not a good value to be converting with. I think the history helps remember these sorts of things as a story is easier to remember than just numbers.

@blue.5666 3 года назад

This helped so much !!! It took me some hours to barely understand what moles even are but thank goodness I bumped into this video !!! You just said a sophomore's chemistry grade !! XD

@deede1 3 года назад

HELLO IN THE PROBLEM FROM GOING TO KM TO CM, COULD WE NOT HAVE USED 515KM:1000M:100CM? I GOT THE SAME ANSWER BUT DIDNT WANT BECAUSE OF DUMB LUCK

@angelineyi4609 3 года назад

Thank you so much! This video helped me tremendously!!

@minkbach9452 Год назад

fab!!!

@nataliebornel2265 Год назад

thank you so much. this is a great help to me for my chemistry class. ❤️

@krulowakrabuw9401 5 месяцев назад

hey, how to calculate density using this method? with converting units, for example from mg/cm3 to g/dm3?

@briarbrooks6473 3 года назад

i high key wish I could by your notebook!

@BocchiTheTurd 2 года назад

got it

@domchavez389 3 года назад

THANK YOU! Grade, sanity, life Saver.

@alexiacalderon6686 2 года назад

one question how is it 10^7?

@elise2005 2 года назад

This was exceptionally helpful, thank you

@hannahjunealthea 3 года назад

Do you have a patreon?? If not, you should totally make one because I'd support you on there! All of your content, especially your videos, is super accessible, engaging, and helpful!! You're the best, thanks for what you do!!!

@jessican.3149 3 года назад

You are God sent! :-)

@debamen9107 Месяц назад

Please I have a question. In double conversions, how do I know what metric comes next to get to my final unit ?

@nildencelebi8938 3 года назад

At around 4 Minutes. I am curious how you got the answer 1.254 x 10^6. The example you gave was with Kg to g, so wouldn't the exponent be 9(?) I guess really the question is how'd you go from 10^3 to 10^6...I got lost there. I love your videos by the way they really do help!!

@adigaribay109 5 месяцев назад

In scientific notation, you count how many places you moved the decimal. In this case, it was moved 3 times to the left, so we add 3 to the exponent and it becomes 6. If I'm understanding correctly 😅

@KC-qw7ld 2 года назад

Thank you sooooo much, great video 🙌

@knad7481 3 года назад

The new IUPAC convention is 1 mol = 22.7 L at 6:56

@melissamaribel 3 года назад

It’s been several years since this was announced but this hasn’t caught on in most Chemistry curriculum. Most teachers still use 22.4L. But of course if your teacher uses 22.7 then I recommend following that.

@redmintdarling1891 5 месяцев назад

At 6:37 can you explain why you rounded up =44317.92 to =44320? I understand we are keeping only the 4 sig figs. But wouldn't the answer be =44318?

@ozzmonster5758 2 года назад

yes Queen

@sluggocleaves 3 года назад

What if you're going from base unit to a conversion unit

@BringMeTheMonkeys Год назад

In literally watching this before my test

@Tanisme777 3 года назад

At 3:47 how did you get 10^6.??? Did u add exponents?

@marianaponce2819 3 года назад

yeah, I am also confused by that?!

@samanthab.0721 3 года назад

She added 3 to the exponent because she had to move the decimal three spaces because you can’t have a number like that in scientific notation. If you are confused watch her video about scientific notation. That should clear it up!

@Tanisme777 3 года назад

Samantha Baez thank you

@milagrosgranados1316 3 года назад

Can you please add a link so I can print out a conversion chart and the metric system chart. I am having a hard time finding one on google that is printable.

@melissamaribel 3 года назад

I have everything you need in my Free Survival Guide which you can get here: melissa.help/freechemguide

@princessbutterfly1042 4 месяца назад

Lmbooooo😂😂😂wow you just taught me to do this in ten minutes i havbe been stuck on this for 2 week please pray for me i have my first test Monday 😢

@andrewe360 3 года назад

Lifesaver

@bellamarie015 2 года назад

why put 10^-2 power at the bottom?

@kimberlyhaugan9983 2 года назад

Like kg to pounds. Its a cinch.

@mack4898 Год назад

how did she get 10 raised to the 7th at 5:08? I am very confused

@serg_og Год назад

Omg you litterally saved my grades 😁🙏🙏

@lblackwood95 2 года назад

2:00

@lblackwood95 2 года назад

2:50

@Itsssjaney Год назад

Hi Melissa, I am not understanding how you got 5.15 X10^7

@Itsssjaney Год назад

Nevermind I figured it out!!!!

@dunemae 10 месяцев назад

@@Itsssjaney could you explain the answer?

@ThomasMR3 9 месяцев назад

How did you get the 10^7? That made no sense to me

@Krishkeditzone_ 3 года назад

East or west Mam is always best 😄

@estherr_xd 2 года назад

I think 515km to cm should be 5.5xE7 though

@crb8619 3 года назад

3:45 but why are u left with that as your answer. Why does the 3 turn to 6. Why did the decimal move one over

@suls829 3 года назад

idk either did you figure it out?

@jordynf2881 3 года назад

it's because she did 1245 x 10^3, which isn't in scientific notation. It would equal 1.245 x10^6 when you put it in scientific notation. its like doing (1.245 x 10^3) x (10^3), if that helps!

@suls829 3 года назад

@@jordynf2881 thank you!!

@felicitymiranda6351 2 года назад

I need to send you an edible arrangement or something.. my chem test is monday and my high school teacher was no bueno so your videos are the only thing that has efficiently taught me actual chemistry. Thank you so much :')

@juan5501 2 года назад

Yo, your finger wagging, is ON POINT.

@priscillasaunders9073 2 года назад

I am so confused. When I use your tip for the base units vs the different units and do the problems with you, I get them right. But my teacher definitely is doing it differently and when I use your tip I get it wrong.

@melissamaribel 2 года назад

What’s a practice problem your teacher is using?

@priscillasaunders9073 2 года назад

@@melissamaribel wow! Thank you for responding, I feel like I’m conversing with a celebrity ⭐️ So one practice problem I did with the teacher was 224dm ---km. When I did it your way, I got 2.24km. But according to my teacher, the answer should have been .224km. He had us do it this was 224dm--- 1m 10dm Then on the other side 1km ---- 1000m And some how that somehow is supposed to equal .224km. I know how I sent it up was confusing. I’m sorry. I didn’t know how to do it more accurately.

@melissamaribel 2 года назад

@@priscillasaunders9073 The set up would look like this: 224 dm x ( 10^-1 m /1 dm) x ( 1 km /10^3 m) this is similar to the example at 5:03 The answer is 0.0224 km. Double check your set up, I have a feeling it's the way you are inputting it in your calculator that is causing the mistake. I have a video on how to input this into your calculator here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-ltww5INnliY.html

@priscillasaunders9073 2 года назад

@@melissamaribel thank you so much for your time! It definitely is me. Not only am I putting the numbers in wrong but I’m rushing because I’m so nervous/anxious. Thank you for all you do ❤️

@niftysisanda1688 3 года назад

❤🙌

@assassingiven5433 2 года назад

I have a test in 4hr

@Lilacstarcat 2 года назад

Im so confused, I wish you showed the math part. I love the explanation of how to set it up but I still don't get how you solved it.

@melissamaribel 2 года назад

I have more videos on this topic here: ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-gURB1JwPfJw.html Stoichiometry Playlist: ru-vid.com/group/PLytGGifnD9dVvn0TuB_oKuD-2CqC0hoUS

@Lilacstarcat 2 года назад

@@melissamaribel Thank you! Ive been watching these all morning, so glad you have other options. ^_^

@tre9952 Год назад

The part that I am confused about is when you divide 1245 by 1x10^3 you get 1.245 but you have it at the top and you get a different answer when it is at the top. Then the other part I am confused about it is how did you get 10^6 afterwards? HELP!!!!