(A) Write the Lewis Structure for GHB

105. Gamma hydroxybutyric acid, GHB, infamous as a "date rape" drug, is used illicitly because of its effects on the nervous system. The condensed molecular formula for GHB is

HO(CH2)3COOH. (a) Write the Lewis structure for GHB.

(b) Identify the hybridization of the carbon atom in the CH2 groups and of the terminal carbon.

c) Is hydrogen bonding possible in GHB? If so, write Lewis structures to illustrate the hydrogen bonding.

(d) Which carbon atoms are involved in sigma bonds? In pi bonds? (e) Which oxygen atom is involved in sigma bonds? In pi bonds? 106. There are two compounds with the molecular formula

HN3. One is called hydrogen azide; the other is cyclotriazene. (a) Write the Lewis structure for each compound.

(b) Designate the hybridization of each nitrogen in hydrogen azide.

(c) What is the hybridization of each nitrogen in cyclotriazene?

(d) How many sigma bonds are in hydrogen azide? In cyclotriazene?

(e) How many pi bonds are in hydrogen azide? In cyclotriazene?

(f) Give approximate values for the N-to-N-to-N bond angles in each molecule. Chapter 10 – Gases

15. Gas pressures can be expressed in units of mm Hg, atm, torr, and kPa. Convert these pressure values. (a) 720 mm Hg to atm

(b) 1.25 atm to mm Hg

(c) 542 mm Hg to torr

(d) 740 mm Hg to kPa

(e) 700 kPa to atm

17. Mercury has a density of 13.96 g/cm3. A barometer is constructed using an oil with a density of 0.75 g/cm3. If the atmospheric pressure is 1.0 atm, what will be the height in meters of the oil column in the barometer? 21. List the five basic concepts of the kinetic-molecular theory. Which assumption is incorrect at very high pressures? Which one is incorrect at low temperatures? Which assumption is probably most nearly correct?

22. You are given two flasks of equal volume. Flask A contains

H2 at 0 °C and 1 atm pressure. Flask B contains CO2 gas at 0 °c and 2 atm pressure. Compare these two samples with respect to each of these properties. (a) Average kinetic energy per molecule (b) Average molecular velocity (c) Number of molecules