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D Question 21 4 pts Write the expression for K for the reaction below. Mg3(PO4)2(s) =...
Question 17 4 pts What is the relationship between Kp and Kc for the reaction below? 4 NO(g) + 6 H2O(g) = 4 NH3(g) + 5 O2(g) A) K- RT RT? B) K- C) K. - (RT)K, RT D) K- OB ОА OD Ос
Given the Reaction, 3 MgBr2 (aq) + 2(NH4 )3 (aq) = Mg3 (PO4 )2 (s) + 6NH4 Br (aq) if 45.2mL of a 0.500 M solution of MgBr2 was added to 79.0mL of a 0.200 M solution of (NH4 )3 PO4 , and 1.151g of Mg3 (PO4 )2 were isolated, what was the percent yield based on the limiting reagent?
Question 4 1 3 Mn2+ (aq) + 2Al(s) + 3 Mn(s) + 2 A13+ (aq) For the balanced equation above, calculate Ecell if [Mn2+1= .05 M and [A13+) = 4 x 10-4M. A.-0.027 V B. +1.42 V C. +0.192 V D. +0.508 V E. -0.541 V. ОА OB Ос OD OE Question 5 1 pts How many grams of tin will plate out from an Sn2+ (aq) solution in an electrolytic cell when 4.13 mol e pass through the circuit?...
V Question 5 3.03 pts Suppose a radioactive isotope has a half-life t% = 99.1 hr. How long will it take for a sample of the isotope to decay to 3.0% of its original activity? a. 218 hr b. 0.0354hr c. 348 yr d. 297 hr e. 501 hr O a Ob Ос Question 6 3.03 pts A radioactive isotope has a half-life, t% = 27.3 yr How long will it take for a 3.27 mCi sample of this isotope...
Question 3 For the balanced redox reaction: 3 Mn2+ (aq) + 2Al(s) →3 Mn(s) + 2 A13+ (aq) Use your previous answer to calculate Key A. 2.6 x 1034 B.5.3 x 1048 C.4.7 x 1034 D. 1.2 x 1052 E. 1.9 x 1012 ОА OB Ос OD e here to search O - FY F4 F5 F6 F7 F8 FO @ # % For the balanced redox reaction: 3 Mn2+ (aq) + 2Al(s) +3 Mn(s) + 2 A13+ (aq) Use...
D Question 7 4 pts Which of the following substances has the lowest solubility in water? A) Hg2Cl2, Ksp = 3.1 x 10-18 B) Caz(PO4)2, Ksp = 2.0*10-29 C) AglO3, Ksp = 3.1 x 10-8 D) CuBr, Ksp = 5.0 x 10-9 Ос OB ОА OD 4 pts Question 8
Write the equilibrium constant expression, K., for the following reaction: If either the numerator or denominator is 1, please enter 1 Mg2+(aq) + 2OH(aq) ? Mg(OH)2(s) K=-
Question 5 For a chemical reaction, AH° 238 = +135.7 kJ and A Sº= +0.379 kJ/K. Calculate A Gº 800 A-167.5 kJ B.-132.8 kJ C. +133.9k D-212.8 kJ E.-192.3 kJ ОА OB ОС OD ОЕ Question 6 0.5 pt For a chemical reaction, Hº 238 = +135.7 kJ and A Sº = +0.379 kJ/K. At what temperature will A Gº=0? A. 213K B. 402K C.358 K D. 470K E. 251K ОА OB Ос OD ОЕ Question 7 0.5 For a...
5 pts Question 17 Which structure belongs to the H NMR spectrum shown below? 3 2 PPM B) 0 C) D) ОА OB Ос OD
Question 1 1 pts Calculate A Gas for the reaction 4NH3(g) + 30,(g) —2N2 (g) + 6H2O() from AG® values in Table 6 of your chem-132 Tables. Time ELE Attempt 3 Minu A-1141.6 kJ B.-571.2 kJ C. 312.2 kJ D. 222.7 kJ E.-1357.0 kJ ОА OB Ос OD ОЕ Question 2 1 pts For a chemical reaction, if A Hºse is positive and AS is negative, will the reaction be spontaneous or nonspontaneous at LOW temperatures? spontaneous nonspontaneous No answer...