If to a solution of NaOH, in water and ethanol (20 ° C) 3 mmol of A (106.11 g / mol) and 2 mmol of B (58.06 g / mol) and stirred magnetically for 10 minutes. After the reaction is completed, we proceed to isolate (work-up) and purify at C (246.29 g / mol) yielding 0.300 g of the pure product.

 

Calculate the% return for C showing his work.

NaOH/H,O Etanol