Simplified Method for Mole Conversions

Mrs. Plybon's Simplified Method for Mole Conversions. This video tells a story to help students remember the easy way to perform mole calculations without performing dimensional analysis.

Category:

Education

Tags:

• mole conversions
• molar mass
• mole

[PresleyPoison15]

what happens if you know what you have for liters and you want to convert to molecules?

[eplybon]

@PresleyPoison15 There are 22.4 L in one mole. Use that information to find out how many moles you have, then you can convert to molecules.

[LeilaLilzMathy]

I have an urgent question, though! On the chart it says to divide by avogadros number to get from atoms to moles, but how do you do that seeing as avogadro's number is scientific notation? Help please!

[eplybon]

@LeilaLilzMathy it's fairly simple to multiply and divide by numbers using scientific notation. The rule is if you are multiplying, you add the exponents and if you are dividing, you subract them. In this case, if you are dividing by Avogadro's number, you would take the exponent of the number on top and subtract 23 (the exponent in Avogadro's number). Example, 7.83 x 10^26 divided by 6.02 x 10^23 would be 7.83/6.02 = 1.30 x 10^3

[maria1239876]

i have a question! i replayed the part on how to convert atoms into grams like ten times but i still am not getting one part

so first we divide atoms by the avogrando's # ( then you said something about going through moles?? thats were you lost me does that mean we have to do something with moles or not??) then after that confusing part we multiply by the molar mass right???

can you help me??

[eplybon]

@maria1239876 what that part is saying is that once you have divided by avagadro's number, you have the number of moles, so you are not done yet. You are correct - if you are wanting to go from atoms to grams, then you will divide by avagadro's number, then multiply by molar mass. Sorry for the confusion :)

[quickadd1]

i agree with everyone else, this video and the chart makes sooo much more sense! i don't understand why professors need to make it so complicated!

[believescience]

The story part of this video wasnt vey helpful, but the chart that you made was a very big help

[0loAlejAndrAol0]

Thank you! this made everything easier!

[TRISTEF13maniakz1]

this is understandable but still hard

[zverevavika]

I wish you were my teacher in real life!

[Xspy70]

Wow. This is so easy now. I hate how the teachers try to explain it "scientifically". I end up with pages full of crap and examples but not an idea of how it works. Thanks!

[ce47862]

Thank you for making this previously confusing subject very simple ... I appreciate what you have done for me ...

[Mrtinngwe]

you should show some questions solving then maybe i'll understand better.