Tetrachloroethylene, C2Cl4, can be prepared by reacting acetylene (C2H2), chlorine and calcium hydroxide. The equation for the reaction is:
C2H2 + Cl2 + Ca(OH)2 --> C2Cl4 + CaCl2 + H2O
assuming an excess of calcium hydroxide, how many moles of C2Cl4 can be obtained if 50.0 g of C2H2 and 115.0 g of Cl2 are used?