Posted by **Megan** on Tuesday, March 23, 2010 at 7:42pm.

How do I find the emperical formula of

16.9% Fe3+

39.7% C2O42-

43.4% H2O

- Chemistry -
**DrBob222**, Wednesday, March 24, 2010 at 12:24am
Take a 100 g sample which means you are starting with

16.9 g Fe^+3

39.7 g C2O4^-2

43.4 g H2O

Convert each gram above to moles by dividing by molar mass.

Then find the ratio (in small whole numbers) to each other. You want the smallest number to be one; the easy way to do that is to divide the smallest number by itself to make it 1.0000, then divide all the other numbers by that same small number. You want to round them to whole numbers BUT don't round a number like 0.5. Instead. if one of the numbers is something and a 1/2, multiply everything by 2 (to get rid of the half) and those numbers then should be rounded to whole numbers. Trust me, it works.

## Answer this Question

## Related Questions

- Chemistry - Kc is 1.67 × 1020 at 25°C for the formation of iron(III) oxalate ...
- Chemistry- DrBob222 - I completed this question like you told me to. Are the ...
- Chemistry - 3) The following set of data was obtained by the method of initial ...
- Chemistry- DrBob222 - 0.2g of an organic sample W, analysed by combustion ...
- chemistry - Hi Can sombody please help me with this problem If a soil sample ...
- Chemistry problem - Hi I'm stuck on these questions can you please help me A ...
- chemistry - I have the same question as Chopsticks determine the emperical ...
- Chemistry - A hydrocarbon gas burned completely in O2 to give CO2 and H2O. It ...
- Chemistry - A hydrocarbon gas burned completely in O2 to give CO2 and H2O.It was...
- chemistry - 5:8 emperical formula with hydrogen and carbon

More Related Questions