Upon reaction of 38.6 g of silver nitrate with excess copper…

Upon reaction of 38.6 g of silver nitrate with excess copper(II) sulfate, 34.1 g of silver sulfate was obtained according to the balanced equation: CuSO4(aq) + 2 AgNO3 (aq)⟶Cu(NO3)2(aq) + Ag2SO4(s) What is the percent yield of silver sulfate?  (If you wish, show your work for possible partial credit.)

Silicon nitride is a very hard, high-temperature-resistant c…

Silicon nitride is a very hard, high-temperature-resistant ceramic used as a component of turbine blades in jet engines. Upon reaction of 38.6 g solid silicon with excess nitrogen, 44.8 g of silicon nitride was obtained according to the balanced equation: 3 Si(s)+2 N2(g)⟶Si3N4(s)  What is the percent yield of silicon nitride?  (If you wish, show your work for possible partial credit.)