A chemistry student determined the empirical formula for titanium sulfide (Ti
xS
y). To do so, she reacted titanium with excess sulfur in a crucible, and recorded the following data:
| Weight of crucible | 11.120 g |
| Weight of titanium | 8.820 g |
| Weight of crucible and product | 31.700 g |
What is the empirical formula of titanium sulfide?