Fe2S3, I think...
CaBr2 :)
If it tells you to find the empirical formula when percent composition is given or if the mass of each element is given in a specific compound.
BrO2
UF6 is the answers.Hope it helps.
Since the atomic mass of sulfur is very close to twice the atomic mass of oxygen, the ratio of numbers of oxygen atoms to numbers of oxygen atoms is close to 43:28.5. The closest ratio of small integers is 3:2; therefore the empirical formula is S2O3.
CaBr2 :)
AgCl
Data:96.2% thallium.3.77% oxygen.The empirical formula is Tl2O.
Chi a+
P2o5
Cr3Si2 is the empirical formula for a compound containing chromium and silicon an has 73.52 mass percent chromium.
CHI3
p2o5
KCl
S2o3
MgO
C4h2s