What is the theoretical yield (in g) of iron(iii) carbonate that can be produced from 2. 37 g of iron(iii) nitrate and an excess of sodium carbonate? 2 fe(no3)3 (aq) + 3 na2co3 (aq) → 1 fe2(co3)3 (s) + 6 nano3 (aq) the molar mass of fe2(co3)3 is 292 g∙mol–1. The molar mass of fe(no3)3 is 242 g∙mol–1.