CaSO4
P2o5
Cr3Si2 is the empirical formula for a compound containing chromium and silicon an has 73.52 mass percent chromium.
S2o3
MgO
VF4
CaBr2 :)
Chi a+
P2o5
Cr3Si2 is the empirical formula for a compound containing chromium and silicon an has 73.52 mass percent chromium.
CHI3
KCl
p2o5
S2o3
MgO
C4h2s
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.
Fe2S3, I think...