final exam f09

final exam f09 - Name: _ Date: _ 1. The number of atoms in...

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Name: __________________________ Date: _____________ 1. The number of atoms in one mole of ammonium phosphate is A) 20 B) 1.0x10 25 C) 1.2x10 25 D) 3.3x10 -23 E) 6.0x10 22 2. The correct name for FeO is A) iron oxide B) iron(II) oxide C) iron(III) oxide D) iron monoxide E) iron(I) oxide 3. How many electrons in an atom can have the quantum numbers n = 4, l = 2? A) 14 B) 12 C) 5 D) 10 E) 6 4. Which of the following statements is false ? A) An orbital can accommodate at most two electrons. B) The electron density at a point is proportional to Ψ 2 at that point. C) The spin quantum number of an electron must be either + 1 2 or – 1 2 . D) A 2 p orbital is more penetrating than a 2 s ; i.e., it has a higher electron density near the nucleus and inside the charge cloud of a 1 s orbital. Page 1
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E) In the usual order of filling, the 6 s orbital is filled before the 4 f orbital. 5. Which of the following atoms would have the largest second ionization energy? A) Mg B) Cl C) S D) Ca E) Na Page 2
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6. Using the following data, calculate the standard heat of formation of the compound ICl in kJ/mol: H ° (kJ/mol) Cl 2 ( g ) 2Cl( g ) 242.3 I 2 ( g ) 2I( g ) 151.0 ICl( g ) I( g ) + Cl( g ) 211.3 I 2 ( s ) I 2 ( g ) 62.8 A) –211 kJ/mol B) –14.6 kJ/mol C) 16.8 kJ/mol D) 245 kJ/mol E) 439 kJ/mol Page 3
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7. The density of mercury is 13.6 g/cm 3 . What is the density of mercury in units of pounds/in 3 ? 2.54cm/in 454g/pound A) 0.076 B) 0.0018 C) 547 D) 15682 E) 0.49 8. As a summer intern at Pfizer Chemical, you are asked to synthesize potassium
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final exam f09 - Name: _ Date: _ 1. The number of atoms in...

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