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Converting Units

Posted: Sun Oct 07, 2018 9:50 pm
by Madison Hurst
When multiple units are defined in a reaction, is it best to convert to equal units before writing out a reaction? Or will it still be a valid answer if units are converted at the end?

Re: Converting Units

Posted: Sun Oct 07, 2018 10:03 pm
by Chem_Mod
Do you have a specific example?

Re: Converting Units

Posted: Sun Oct 07, 2018 10:24 pm
by davidryan3f
Convert the units beforehand so that the math will be valid. For example in an m1v1=m2v2 problem, the volumes must be in the same units.

Re: Converting Units

Posted: Mon Oct 08, 2018 9:24 am
by madisondesilva1c
In order to end up with the correct quantities, especially when using dimensional analysis it is much easier to convert all mL to L and all kg to g, in order to properly convert to mol.g-1 (etc.). Therefore I recommend converting units in the beginning so you do not have trouble canceling out units when attempting to write empirical and molecular formulas using mole ratios.

Re: Converting Units

Posted: Mon Oct 08, 2018 10:05 am
by katherinemurk 2B
For me personally, it is much easier to convert all units to the correct units in the beginning instead of at the end. I don't know if that is the best way but it has worked for me!

Re: Converting Units

Posted: Mon Oct 08, 2018 11:11 am
by Ibrahim Malik 1H
I think it is best to convert units as you solve the problem because units cancel out as you solve the problem. Converting units at the end of the problem could lead to confusion and error.