(3 pts) In a preparation of K[CH(C20.)2(H2O)2]2H20 according to equation below, 12.0 g oxalic acid was allowed to react with 4.00 g potassium dichromate; 8.20 g of the K[Cr(C2O4)2(H20)2]2H20 was isolated. What was the percent yield in this synthesis? K2Cr207 + 7 H2C204 2H2O 2 K[Cr(C20.),(OH2)2] 2H20 + 6CO2 + 13H30