30.Which of the followingcombinations of quantum numbersis impossible?
(a)n=1, l = 0, ml= 0, ms= 1/2(b)n=2, l = 1, ml= -1, ms= -1/2(c)n=2, l = 0, ml= 1, ms= -1/2(d)n=3, l = 2, ml= -2, ms= 1/2Answer __________
31. Which is the correct groundstate electron configuration for theneutral Ca atom?
Answer _________
32. The first four ionization energiesof an element are 1.49 x 10-18J,2.92 x 10-18J, 2.5 x 10-17J, 3.5 x 10-17 J. To which group of the periodictable does the element belong?
17
33. What is the formula ofmanganese (IV) oxide?
Answer _________
34. How many oxygen atoms arethere in 27.04 grams of calciumphosphate?
(a) 3.535 x 1023atoms(b) 4.201 x 1023atoms(c) 4.518 x 1023atoms(d) 5.663 x 10
23
atoms
Answer _________

35. An iron ore called magnetitecontains only iron and oxygen. Inrefining 100.0 grams of the ore,72.25 grams of iron were obtained.What is the empirical formula of theore?
Answer _________(For 2 bonus points, what is oddabout this compound?)Answer ________________________
36. Assuming that the density ofwater is 1.00 g/mL, what is themolar concentration of pure water?
36. Assuming that the density of
37. In the dilution of 100.0 mL of a0.10 M solution of HCl to a finalvolume of 200.0 mL, what remainsunchanged?
Answer _________
38. Balance the redox reactionshown below.aKClO3+ bHBr cBr2+ dKCl + eH2O
(a) a=1; b=3; c=1; d=3; e=3(b) a=1; b=3; c=3; d=1; e=3(c) a=1; b=6; c=3; d=1; e=3(d) a=1; b=6; c=1; d=3; e=3Answer _________39. Identify the reducing agent andthe oxidizing agent in the abovereaction.
Answer _________

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