How to Convert Units in Chemistry

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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[@mujigau]

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

[@jordynf2881]

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

[@aaliyeah5071]

Good trick! 😊

[@AdedokunAdebo]

Agreed!!! 😂

[@lynesedoukoure5573]

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]

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]

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

[@XxAlex530xX]

Did you pass?

[@jazzytea123]

did you pass?

[@crashawaker8890]

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

[@sendesalbahathly3130]

Same

[@anabelellison4006]

fr tho

[@ethandehantschutter7003]

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]

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

[@eeeeemeeee9047]

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

[@martinconnelly1473]

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]

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]

@@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]

@@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]

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!!!

[@klr1572]

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^.

[@officialkreativek]

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]

subscribed! I've never seen anyone explaining this better

[@barakahdugan8741]

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

[@dddaaa6965]

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]

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

[@dorisicia19]

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

[@KarleeR]

I don’t understand how you get the end answer

[@sabrinam2804]

same??

[@iMaGiNaTiOnWpAsSiOn]

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]

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]

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

[@dessmund5001]

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

[@spirituallyenergized]

Thank you Melissa you're the best!

[@syedmohammed4608]

❤️😍

[@giovannaalessio]

Thank you!!!! you helped me a lottt

[@connornichols2248]

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

[@tatyanapresny3540]

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?

[@ananya583]

Beautiful Illustrations ❤️❤️

[@_rae]

this is sm help, thank you

[@deede1]

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

[@Lkn6789]

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]

Yes that's it haha Love it!

[@briannacernadas9828]

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!!!

[@krulowakrabuw9401]

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

[@aiyanahakopian7912]

thank you so much this saved me!!

[@sonialeon1115]

your a life saver I love your videos

[@alexandriawellman8601]

I wish my professor explained it this way!

[@alejandrag.639]

Your video has saved me 🙌

[@debamen9107]

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

[@dddaaa6965]

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.

[@davidegbe8262]

Awesome!

[@pockettes3918]

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 ^_^

[@alexiacalderon6686]

one question how is it 10^7?

[@dreamampm8679]

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

[@lauren9004]

Thank you!

[@redmintdarling1891]

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?

[@siuyung3404]

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

[@esterfigueroa7952]

Thank you so much

[@nildencelebi8938]

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]

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 😅

[@milagrosgranados1316]

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]

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

[@user-hr4ty9xs6y]

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

[@claudialoverap]

You just won a new subscriber thank youuuuuuu

[@melissamaribel]

Woo hoo!! 🎉

[@fxckinglollipops]

My attention span loves the visuals

[@neverything4402]

So helpful

[@lindasulpacio5737]

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

[@martinconnelly1473]

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.

[@Mikeh404]

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

[@kyleelangevin3671]

THANK YOU

[@dddaaa6965]

I love this video

[@Tanisme777]

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

[@marianaponce2819]

yeah, I am also confused by that?!

[@samanthab.0721]

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]

Samantha Baez thank you

[@chevonjackson]

Hello Melissa! Thank you so much for this channel.

[@sluggocleaves]

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

[@natalymarji8033]

Thanks!

[@melissamaribel]

Thank you for your support ❤️

[@bighitcrackheads9360]

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.

[@mack4898]

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

[@minkbach9452]

fab!!!

[@bellamarie015]

why put 10^-2 power at the bottom?

[@briarbrooks6473]

i high key wish I could by your notebook!

[@danloyer6241]

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

[@hannahjunealthea]

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!!!

[@mels401]

this is so helpful thank youu!

[@blue.5666]

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

[@princessbutterfly1042]

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 😢

[@ThomasMR3]

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

[@nataliebornel2265]

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

[@angelineyi4609]

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

[@jessican.3149]

You are God sent! :-)

[@linshu9847]

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 ☺

[@BringMeTheMonkeys]

In literally watching this before my test

[@alaaalddd4326]

Ty for helping me in studying ❤️❤️❤️

[@BocchiTheTurd]

got it

[@ozzmonster5758]

yes Queen

[@knad7481]

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

[@melissamaribel]

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.

[@elise2005]

This was exceptionally helpful, thank you

[@lblackwood95]

2:00

[@lblackwood95]

2:50

[@Thatpartpodcastt]

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

[@Thatpartpodcastt]

Nevermind I figured it out!!!!

[@dunemae]

@@Thatpartpodcastt could you explain the answer?

[@KC-qw7ld]

Thank you sooooo much, great video 🙌

[@domchavez389]

THANK YOU! Grade, sanity, life Saver.

[@crb8619]

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]

idk either did you figure it out?

[@jordynf2881]

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]

@@jordynf2881 thank you!!

[@andrewe360]

Lifesaver

[@kimberlyhaugan9983]

Like kg to pounds. Its a cinch.

[@Krishkeditzone_]

East or west Mam is always best 😄

[@juan5501]

Yo, your finger wagging, is ON POINT.

[@estherr_xd]

I think 515km to cm should be 5.5xE7 though

[@Uko4466_]

I don't understand how you got the 10^6g wouldn't it be 10^3g

[@priscillasaunders9073]

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]

What’s a practice problem your teacher is using?

[@priscillasaunders9073]

@@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]

@@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: kzbin.info/www/bejne/oqXaqGh_g9Ofn7s

[@priscillasaunders9073]

@@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 ❤️

[@Lilacstarcat]

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]

I have more videos on this topic here: kzbin.info/www/bejne/nYa1c2SArLWZgNk Stoichiometry Playlist: kzbin.info/aero/PLytGGifnD9dVvn0TuB_oKuD-2CqC0hoUS

[@Lilacstarcat]

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

[@assassingiven5433]

I have a test in 4hr

[@tre9952]

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!!!!

[@serg_og]

Omg you litterally saved my grades 😁🙏🙏

[@niftysisanda1688]

❤🙌

[@felicitymiranda6351]

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 :')

[@phoenixgaming415]

I have a General Chemistry Exam in 2 hours. Wish me luck.

[@melissamaribel]

Good luck!

[@eliskarepova2671]

queen

[@prashantkumar6421]

Which country you belong to..

[@hemidkinisso5435]

It is better to explain how you got the answers

[@besmamohsin643]

I STILL DONT UNDERSTAND

[@bentleygamertv1624]

You lost me at 3:47 how did you go from 1245 x 10^3 to 10^6

[@jetleeyonque1636]

same

[@coolestkidontheblock1]

i’m cooked bro