Chem6a - 1 Mon, Nov 29 Chem 6A Michael J. Sailor, UC San...

Info iconThis preview shows pages 1–13. Sign up to view the full content.

View Full Document Right Arrow Icon
Chem 6A Michael J. Sailor, UC San Diego Mon, Nov 29 1
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 6A Michael J. Sailor, UC San Diego 2 Atomic Energy Transitions One of the emission lines from the star σ Ori AB in the constellation Orion occurs at a wavelength of 656.5 nm. The line arises from atomic hydrogen contained in that star. This line probably corresponds to the following electronic transition: a) n=5 to n=1 b) n=3 to n=2 c) n=3 to n=1 d) n=4 to n=2 e) n=5 to n=2
Background image of page 2
Chem 6A Michael J. Sailor, UC San Diego 3 Atomic Energy Transitions One of the emission lines from the star σ Ori AB in the constellation Orion occurs at a wavelength of 656.5 nm. The line arises from atomic hydrogen contained in that star. This line probably corresponds to the following electronic transition: a) n=5 to n=1 2.09 x 10 -18 J b) n=3 to n=2 3.03 x 10 -19 J c) n=3 to n=1 1.94 x 10 -18 J d) n=4 to n=2 4.09 x 10 -19 J e) n=5 to n=2 4.58 x 10 -19 J 3.028 x 10 -19 J
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 6A Michael J. Sailor, UC San Diego 4 Lewis Structures Which is the most plausible Lewis structure of the cyanate ion? a) b) c) d) B and C are equally most plausible e) A and B are equally most plausible N C O C N O C O N [ ] - [ ] - [ ] -
Background image of page 4
Chem 6A Michael J. Sailor, UC San Diego 5 Lewis Structures Which is the most plausible Lewis structure of the cyanate ion? a) b) c) d) B and C are equally most plausible e) A and B are equally most plausible N C O C N O C O N [ ] - [ ] - [ ] -
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 6A Michael J. Sailor, UC San Diego 6 Formal Charges For the following Lewis structure of the cyanate ion, the formal charge on N is: a) +1 b) -1 c) 0 d) -6 e) none of the above [ ] - N C O
Background image of page 6
Chem 6A Michael J. Sailor, UC San Diego 7 Formal Charges For the following Lewis structure of the cyanate ion, the formal charge on N is: a) +1 b) -1 c) 0 d) -6 e) none of the above [ ] - N C O
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 6A Michael J. Sailor, UC San Diego 8 Percent Composition A 0.202 g sample of iron ore (Fe x O y )is dissolved in hydrochloric acid and 17.9 mL of 0.0223 M KMnO 4 are required to reach the stoichiometric point. What is the percent by mass of iron present in the sample? The balanced net ionic equation for the titration reaction is given below: 5Fe 2+ + MnO 4 - + 8H + 5Fe 3+ + Mn 2+ + 4H 2 O a) 11.1 % b) 55.2 % c) 36.4 % d) 44.8 % e) none of the above
Background image of page 8
Chem 6A Michael J. Sailor, UC San Diego 9 Percent Composition A 0.202 g sample of iron ore (Fe x O y )is dissolved in hydrochloric acid and 17.9 mL of 0.0223 M KMnO 4 are required to reach the stoichiometric point. What is the percent by mass of iron present in the sample? The balanced net ionic equation for the titration reaction is given below: 5Fe 2+ + MnO 4 - + 8H + 5Fe 3+ + Mn 2+ + 4H 2 O a) 11.1 % b) 55.2 % c) 36.4 % d) 44.8 % e) none of the above
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 6A Michael J. Sailor, UC San Diego 10 Periodic Trends Rank the following elements in terms of their Frst ionization energies, with the highest (most endothermic) listed Frst: B, C, N, O, ± a) B, C, ±, N, O b) O, ±, N, C, B c) ±, N, O, C, B d) ±, O, N, C, B e) ±, O, C, N, B
Background image of page 10
Chem 6A Michael J. Sailor, UC San Diego 11 Periodic Trends Rank the following elements in terms of their Frst ionization energies, with the highest (most endothermic) listed Frst: B, C, N, O, ± a) B, C, ±, N, O b) O, ±, N, C, B c) ±, N, O, C, B d) ±, O, N, C, B e) ±, O, C, N, B
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Chem 6A Michael J. Sailor, UC San Diego 12 Bonding
Background image of page 12
Image of page 13
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 52

Chem6a - 1 Mon, Nov 29 Chem 6A Michael J. Sailor, UC San...

This preview shows document pages 1 - 13. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online