what mass of oxygen os combined with 9.04 grams of sulfur in SO3?

Question

aaronq · Answer

start by finding their mass percent composition.

anonymous · Answer

I have gotten that far, In need of the next step

aaronq · Answer

we'll think about if  $S\%_{composition} \;in\;SO_3=9.04 g$

and $S\%_{composition}+O\%_{composition}=100\%$, 

how much mass would you need to get to 100%?

goformit100 · Answer

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