Author: Anonymous

Underwood, Inc. manufactures two products. It currently has 2,000 hours of direct labor and 1,000 hours of machine time available per month. The table below lists the contribution margin, labor and machine time requirements, and demand for each product.    Product A Product B Unit contribution margin $ 49.00   $ 41.00   Demand   1,000 units   2,000 units Labor time   ¾ hour   ½ hour Machine time   1 hour   ½ hour   What is the contribution margin per machine hour for Product A?

Which of the following is not a limitation of using the accounting rate of return method for capital budgeting?

15) In the reaction given below, the two acids are _______ and __________.                                       HNO3 +  H2O      H3O+  +   NO3–

28) Consider the following reaction: 2CH4 (g)   3H2 + C2H2(g)A reaction mixture at 1700 o C initially contains [CH4] = 0.115 M. At equilibrium, the mixture contains [C2H2] = 0.035 M. What is the value of Kc?  

10) Consider the following reaction at equilibrium:           2NH3 (g)     3H2 (g) + N2(g)   [∆Hº = + 92.4 kJ]           [Hint = The reaction is Endothermic] Adding H2 (g) to the above system at equilibrium will______________.

9) Consider the following equilibrium                                         2SO2 (g) + O2(g)       2SO3 (g) + Heat         [Hint = The reaction is Exothermic] In which of the following will both stresses shift the equilibrium to the right?

24) Consider the graph shown below and answer the following question. What part of the curve corresponds to the optimum buffer action of the acid/conjugate ion pair? Question 24-25.png 

4) The equilibrium constant (Ka) for the acid ionization of mercapto-ethanol (HS–CH2CH2–OH) is 1.91 x 10–10.      [H–SCH2CH2–OH(aq)       H+(aq)  +  –SCH2CH2OH (aq)     Ka = 1.91 x 10–10]       Which of the following statements is true regarding this equilibrium?The reaction is product favored.The reaction is reactant favored. Equilibrium lies far to the right. Equilibrium lies far to the left.

18) Which two equations illustrate water (H2O) acting as a proton donor? CH3COO – (aq) + H2O(l) → OH–(aq) + CH3COOH(aq) HNO3 (aq) + H2O(l)    → H3O+(aq) + NO3 – (aq)   2Na(s) + 2H2O(l)   → 2NaOH(aq)  + H2(g)     NH3 (g) + H2O(l)  → NH4OH(aq)

29) Consider the following reaction:                 N2(g) + O2(g)     2NO(g)Suppose we have a reaction mixture in which the initial concentration of [N2] is 0.20 M and the initial concentration of [O2] is 0.20 M. The Kc = 0.10. Find the equilibrium concentrations of N2, O2 and NO. To solve this problem, please use the I.C.E. table.