Limiting Reactant don’t understand so would appreciate if u could help

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration. what is the titrant volume? titrant analyte indicator titrant volume analyte concentration naoh ch3cooh phenophthalein select one: a. 20.0 ml b. 27.0 ml c. 30.0 ml d. 24.0 ml

0.09 moles of sodium sulfate in 12 ml of solution

How many moles of al3+ ions are in 1.25 moles of al2o3