Titanium chloride is TiCl. You must convert those grams given to
you into moles first.
So you have .311 g Ti and .689 g Cl.
So....
to convert to moles:
for Ti:
find the molar mass of Ti. This is 47.90g/mol.
0.311g Ti x 1 mol Ti/47.90g/mol Ti= .006mol Ti
For Cl:
The molar mass of Cl is 35.45g/mol.
0.689g x 1mol Cl/35.45g/mol= .019mol Cl
So you've got 0.006mol Ti and 0.019mol Cl. Now you have to
divide both by 0.006 to get the empirical formula.
So:
0.006/.006= 1mol Ti
.019/.006= 3mol Cl
Your empirical formula would be TiCl3