Question

1. When mixed, solutions of silver nitrate, AgNO, and sodium phosphate, Na3PO4, will form a precipitate of silver phosphate, Ag2PO4. The balanced equation is: 3AgNO3(aq) + Na3PO4(aq) Ag3PO4(s) + 3NaNO3(aq) Which of the following statements regarding this reaction is incorrect? A. 6 moles of AgNO, will react with 2 moles of Na2PO4 B. 9 moles of AgNO3 will form 2 moles of Ag3PO4, given sufficient Na3PO4 C. 1.5 moles of NaNO, will be formed when 0.5 mole of Na PO, reacts with sufficient AgNO. D. 3 moles of Ag3PO4 will be formed when 3 moles of Na PO, react with sufficient AgNO3. E. 2 moles of Na PO, will react with 6 moles of AgNO. 2. Phosphine, PH2, a reactive and poisonous compound, reacts with oxygen as follows: 4PH3(g) +802(8) P4010(s) + 6H20(g) If you need to make 6.5 moles of P,010, how many moles of PH, would be required for the reaction? A. 6.5 moles B. 13 moles C. 26 moles D. 3.2 moles E. 1.6 moles 3. Given that 4NH3(g) + 50 (g) 4NO(g) + 6H2O(g), if 82.0 g of NH3 react with sufficient oxygen, how many grams of NO will be formed? A. 145 g B. 5.80 1028 C. 46.5 g D. 1868 E. 11.68 4. When a 0.525 g piece of zinc is placed in a solution of copper(II) sulfate, copper metal and zinc sulfate are formed. Balance the equation for the reaction, and determine the mass of copper(II) sulfate that would react with this quantity of zinc. - Zn(s) + __CuSO4(aq) ZnSO4(aq) + _Cu(s) A. 65.4 g B. 0.641 g C. 1.28 g D. 2.56 g E. 159 g

Answer 1