Exam-1-C - Fall 2010 CHEMISTRY 104 Section 001 Exam 1 Name:...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Fall 2010 CHEMISTRY 104 Section 001 Exam 1 Name: ____________________ ID: XXX-XX-_ ______ Seat #: ___ 1. Which substance involves no bonding forces except London dispersion forces? A) H 2 O(l) B) NaCl(l) C) HF(l) D) K(s) E) N 2 (s) 2. Calculate the osmotic pressure (in torr) of 6.00 L of an aqueous 0.245 M solution at 30. o C, if the solute concerned is totally ionized into three ions (e.g., it could be Na 2 SO 4 or MgCl 2 ). A) 18.3 torr B) 4.63e3 torr C) 1.38e3 torr D) 1.39e4 torr E) 1.54e3 torr Use the following to answer question 3. Consider the following data concerning the equation: H 2 O 2 + 3I - + 2H + I 3 - + 2H 2 O [H 2 O 2 ] [I - ] [H + ] rate I 0.100 M 5.00 x 10 -4 M 1.00 x 10 -2 M 0.137 M/sec II. 0.100 M 1.00 x 10 -3 M 1.00 x 10 -2 M 0.268 M/sec III. 0.200 M 1.00 x 10 -3 M 1.00 x 10 -2 M 0.542 M/sec IV. 0.400 M 1.00 x 10 -3 M 2.00 x 10 -2 M 1.084 M/sec' 3. The average value for the rate constant k (without units) is A) 2.74 x 10 4 B) 2710 C) 108 D) 137 E) none of these Page 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
Use the following to answer questions 4-5. For the reaction 2N 2 O 5 (g) 4NO 2 (g) + O 2 (g), the following data were collected: t (minutes) [N 2 O 5 ] (mol/L) 0 1.24 * 10 –2 10. 0.92 * 10 –2 20. 0.68 * 10 –2 30. 0.50 * 10 –2 40. 0.37 * 10 –2 50. 0.28 * 10 –2 70. 0.15 * 10 –2 4. The order of this reaction in N 2 O 5 is A) 3 B) 2 C) 1 D) 0 E) none of these 5. The concentration of O 2 at t = 10. minutes is A) 2.0 * 10 –4 mol/L B) 0.16 * 10 –2 mol/L C) 0.32 * 10 –2 mol/L D) 0.64 * 10 –2 mol/L E) none of these 6. The triple point of CO 2 is at 5.2 atm and –57°C. Under atmospheric conditions present in a typical Boulder, Colorado, laboratory ( P = 630 torr, T = 23°C), solid CO 2 will: A) remain solid. B) melt. C) boil. D) sublime. E) none of these Page 2
Background image of page 2
7. Silver chloride crystallizes with the sodium chloride (rock salt) structure. The length of a unit cell edge is 555 pm. What is the density of AgCl? A) 5.57 g/cm 3 B) 4.19 g/cm 3 C) 2.79 g/cm 3 D) 1.39 g/cm 3 E) 2.10 g/cm 3 8. On the basis of your knowledge of bonding in liquids and solids, arrange the following substances in order of highest to lowest melting temperature: NaCl, Na, Cl
Background image of page 3

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

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 11

Exam-1-C - Fall 2010 CHEMISTRY 104 Section 001 Exam 1 Name:...

This preview shows document pages 1 - 4. Sign up to view the full document.

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