Question

Suppose the theoretical yield in a reaction is 11.8 g and the percent yield is 58.2 %. What is the 36. actual yield of product obtained? A) 687 g B) 6.87 g C) 20.3 g D) 0.203 g Consider the oxidation of sodium metal to sodium oxide described by the balanced equation: 37. 4 Na+ O2 2 Na:O. What is the theoretical vield of Na:O in grams from 9.0 mol of O? 210 g of Na;O 18 g of Na O D) A) 560 g of Na O 410 g of Na;O E) B) 1,100 g of Na O C) Potassium metal (K) reacts violently when added to water according to the balanced equation: 38. 2 K(s)+ 2 H2O( )-2 KOH(aq ) + H2(g). How many moles of H2O are needed to react completely with 7.54 mol of K? D) 3.77 mol of K- A) 2 mol of K B) 7.54 mol of-K C) 15.1mol of-K How many moles of sodium chloride (table salt, NaCl, molar mass 58,44 g/mol) are contained in a 1-lb box of table salt? (454g=1 lb) 39. D) 7.77 mol of NaCl 26.500 mol of NaCl A) 0.129 mol of NaCl E) 4.68 x 104 mol of NaCl B) 58.44 mol NaCI C)

Answer 1

1-83 Theoelical Yicld (36, Perscent S 8 2 Yield Actlal eld hat Pexcent Yield = Theeetical yied X (o0% know we Act ual Yield 58. a (s8 2)C89 6-873 Actlai Yield Actual ield BL8.9 AnGwex

37 Balanced e4 4 Na t o PYoduce 2 mole of Ngo 4mol o Pyoduce (8 mol ot N4o . e mol Na0 = 629 /mol (62)= 1416 18 Theoye ical ield oNao = 165 (38 &iven 2ko (at) ta g) Rle) a moles 7. S t mole of o Teac with 7: 54 moles k Cox) a mo le K CYoss mu amoly ko 12 a (7.s4) 7 S4 꾜 mols bo 7-54 mde k - of 0 Answos 7- 54 mol

39 &iven given S 4 ase 58 49 But 454 7 cYo55muliplicatton 5 mo| 7768 mol S8.4 49 777 mol Nac) Answer D