/sci/ - Science & Math » Thread #14288945

3MiB, 1184x2104, Combustion of Propanol.png

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Anonymous Tue 08 Mar 18:29:08 2022 No.14288945 View Reply Original Report

Quoted By:

I need your help, /sci/. How do I find the moles of alcohol burned so I can calculate the enthalpy of combustion?

Anonymous

Anonymous Tue 08 Mar 2022 18:49:20 No.14288983 Report

Quoted By: >>14289006

You know the mass of ethanol burned and you also know the molar mass of ethanol in g mol^-1.
Divide
Also learn how to write, you have the penmanship of a melanated individual

OP Tue 08 Mar 2022 18:59:02 No.14289006 Report

Quoted By: >>14289120 >>14289130

>>14288983
Do I divide the mass of ethanol burned by the molar mass of ethanol or vice versa?

Anonymous

Anonymous Tue 08 Mar 2022 19:53:25 No.14289120 Report

Quoted By:

>>14289006
The former. Anon you should really recycle your HS math if this is confusing you -- I suggest these as they helped me a lot

https://artofproblemsolving.com/store/online

Anonymous

Anonymous Tue 08 Mar 2022 20:00:29 No.14289130 Report

Quoted By:

>>14289006
look at the units of the values you have

Anonymous

Anonymous Wed 09 Mar 2022 00:09:15 No.14289656 Report

Quoted By:

50% of problems like this can be solved just by looking at units.

>you have: g, g/mol
>you want: mol
>mol = g*mol/g = g ÷ g/mol

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