Practice: Converting between Moles and Grams

Converting between moles and grams is a fundamental chemistry skill. In this video there are six problems with explanations. The problems start easy and then become more difficult. At the end of the video you should be comfortable converting from moles to grams and grams to moles.
One method to mole conversions is to use something called the Mole Map. This provides a visual tool to know when to multiple and when to divide. The Mole Map is also useful for conversions between the mole and liters as well as atoms and molecules.
For more help with moles to grams conversions and more:
• More Moles to Grams Practice: • Practice: Converting b...
• Molar Mass in Three Easy Steps: • How to Calculate Molar...
• Understanding the Mole: • Understanding the Mole...
• Moles - Gram Conversions: • Practice: Converting b...
• How to Balance Chemical Equations: • How to Balance Chemica...
• Mole Ratio: • How to Find the Mole ...
• Reaction Stoichiometry: • How to Solve Reaction ...
My chemistry website: www.Breslyn.org
The mole map is based on conversion factors, which using the factor-label/dimensional analysis is another way to convert between moles and grams. The conversion factor used is the molar mass of the element or compound. This is the preferred method for mole conversions.
Conversions should be automatic (you don’t really need to think about it much to find the answer). This requires lots of practice converting between moles and grams. The more you practice the less effort that is required, and you can focus on solving the bigger chemistry problems (like reaction stoichiometry).
The video is organized like a worksheet where you answer the problems and the check your answers.

[@Uneeq1]

where have you been throughout my college life? I have a major test tomorrow and things finally make sense. I love your formula. Made everything so much easier. God BLess you, Wayne!

[@wbreslyn]

Thanks and all the best on your test!
- Dr. B

[@tazeembibi6803]

I m too much lucky bro m here in the first's days of my college.

[@charliei3841]

im doing this in my 10th grade class in highschool, they teaching us way to early

[@tamiahransome5785]

OMG I LOVE YOU !!YOU MADE ME UNDERSTAND WHAT I THOUGHT WAS UN-UNDERSTANDABLE😭❤wish me luck on my test tmrw☺

[@sierrastratton4455]

thank you! i love the interactive style of the video, very helpful!! and thank you for easy and thorough explanations :)

[@wbreslyn]

Glad it was helpful!

[@vjay10]

Why tf can't my professor just say this! Thank you! you are helping me understand and pass my course!

[@AT-sk7nm]

You seriously help me so much. your videos are extremely clear to understand

[@wbreslyn]

Thank you!

[@jasonchu212]

wow the desired over given (DoG) totally blew my mind! haha it is so much easier to remember it. Thank you Dr. B.

[@DxzaiKxnnie_Dxmigxrl_SheTheyXe]

Thank you!!! The formulas of Moles to particles, grams to moles, etc., helped me the most. I wish my teacher taught me that!

[@bhawnamehta2261]

You are a lifesaver!! Here I am, sitting at my home with my fingers on my chin right after finishing my exams due to covid-19 and watching your videos...

[@wbreslyn]

Hope your exams went well! --- Dr. B

[@bhawnamehta2261]

Yup! They did! The results aren't out yet. It will take time. It was my first competitive exam...

[@wbreslyn]

@@bhawnamehta2261 Good to hear. Hope you get high marks!

[@dailydogfoodrecipes8984]

WOW this makes so much more sense. Thank you.

[@Natedog1520]

thanks for making life easier

[@kar2190]

thank you so much for teaching this in a simple way 🥺

[@wbreslyn]

You're very welcome!

[@analien7458]

thank you so much for this great explanation !

[@wbreslyn]

You are welcome!

[@ALIASGHARLASHKARI]

you are the best man

[@im.shivam]

thanks man ,
it really helped me I appreciate it

[@nerdlove1071]

Thanks!

[@wbreslyn]

Wow, thank you! It is most apperciated!

[@zillowd4915]

much love Thanks

[@wbreslyn]

Any time!

[@surajkumar-ds6vv]

Thanks 🙏🙏 from india

[@christinaperri9870]

Thank you

[@wbreslyn]

You're welcome! --- D.r B

[@matiusclicarelli700]

Hey 6:58 I could be wrong, but with this problem, should the answer not contain only 2 sig figs (ie 27g) considering the question is 0.37
Which is only 2 sig figs.

[@DatBoiiTR3Y]

Thank you so much 😭😭

[@wbreslyn]

Welcome 😊

[@Sasha.Fauchereau]

Wow you are good!

[@wbreslyn]

Thanks!

[@chrisg.5798]

TYSMMM

[@wbreslyn]

YWSMMM!

[@ClashmanTV948]

Hi sir how do you calculate the estimate?

[@Punct124]

What a great video Dr.B

[@wbreslyn]

Thanks, it seemed like something that would be helpful to people learning to convert between moles and grams. It's a prerequisite skill for so many other chemistry topics. -- Dr. B

[@Punct124]

Wayne Breslyn indeed Dr.B

[@Punct124]

Wayne Breslyn Dr.B i’ve got a question if you don’t mind. When we exhale on a cold day we see water vapor from our breath condensing. But my question is the following is it the cold air in front of us that gets saturated with water vapor thus water condenses or is it our warm air that gets cooled and can’t hold the same amount of water vapor thus the water condenses. This question got me thinking and i thought i should ask it away.

[@wbreslyn]

I'd say it's the warm air from our breath hitting the cold air and condensing. Sort of like breathing on a cold window and having it fog up. There is a large difference between our breath and the air on a cold day...

[@Punct124]

Wayne Breslyn Thank You Dr.B

[@sahajasakhunala5023]

wayne, i love the way you've explained and understood better than anyone, but can you be a bit louder next time while recording?!!!
just a humble request from my side wayne.

[@user-eu4vj2gs1z]

what's the use of 22.4 in the mole map?

[@wbreslyn]

It is for converting an ideal gas from moles to liters. So if you had 44.8L of an ideal gas, like O2, you could divide by 22.4 to get the number of moles of O2.

[@yugarthsharma626]

Cool

[@wbreslyn]

Thanks! --- Dr. B

[@xkarnx2355]

Say for the 0.37 in grams I got 74.1 and how did you get the 74.09 grams? Is there some secret as to how you get that?

[@ragnar53104]

I'm pretty sure your answer is right, your answer is just rounded unlike his. Calculators will give you different answers also.

[@nasiruddinpanchi1392]

In the 1st problem how did u get 43.25gram~2.5mol ??

[@wbreslyn]

Since one mole of water is about 18 grams per mole (that's the molar mass) I figured two moles would be 36 grams. Since I have 43.25 grams, and this is more than 36 g, I know I have more than 2 moles. But 3 moles of water would be too, much. So I estimated 2.5 moles.
Estimating this way makes you think (a good thing!) and it helps you know if your final answer makes sense. Over time you estimating becomes very fast and you almost do it automatically.
---- Dr. B

[@xx2co0l4uxx8]

i didn't understand the process of balancing the equations

[@syedrayan5843]

😍 it zwwr

[@wbreslyn]

😎

[@zigzagchill]

When going from moles to grams you mole-tiply 😂

[@wbreslyn]

My students always groan when I stay that in class. But they also remember it!