3 Na2SO4 + 2 FePO4 → Fe2(SO4)3 + 2 Na3PO4 1) What is the theoretical yield of Na3PO4 if you have 25 grams of FePO4 and 30 grams of Na2SO2? What are the limiting reactant and the excess reactant?
2) If on the lab you actually make 18.5 grams of Na3PO4 what is your percent yield?

the answer is c. nacl

answer: semi-infinite solid initially at a uniform temperature of 400 ◦c is cooled at its surface by convection. the cooling fluid at a constant temperature of 200 ◦c has a convective coefficient (ha) of 250 w/m2.k. the physical properties of the solid: k = 20 w/m.k and α = 4 * 10-5  m2/s. using δx = 0.04 m and δt = 10 s. write the finite difference equations describing the transient heat transfer of the first five δx and the temperature profile after 30 s.