coletrain chemistry question

[vexx]

yeah ur right its .100g my bad

well
0.100g P  (.228-.1=)0.128g O

Find n(P) and n(O)
divide by the smallest figure

And then you'll have a mol ratio of
x : 1

and times both sides by a number to get both of them as close to a full number... and voila empirical formula.

[Blakhitman]

http://merspi.com/questions/1199/what-is-the-empirical-formula-for-the-hydrocarbon-if-11g-of-a-hydrocarbon-was-com

Second answer is very useful, have a look.

[coletrain]

what is mg^-1. is it mol/gram.

The question is asking is the sulfur dioxide level in the sample more than the government authorised level of 250mg^-1