Supplemental Instruction
Iowa State University / Leader: / Prina
Course: / Chem 177
Instructor: / Dr. Greenbowe
Date: / 12/09/2014
1) The pressure of a gas will ______when the volume is decreased and will ______when the absolute temperature is decreased.
a) increase, increase b) increase, decrease c) decrease, increase d) decrease, decrease
2) If the absolute temperature of a gas is doubled and the pressure is halved, how will the volume change?
a) It will increase by two times its original value
b) It will decrease to one fourth of its original value
c) It will stay the same as its original value
d) It will increase by four times its original value
3) What are standard temperature and pressure conditions for gases?
a. 0°C and 0 torr b. 0 K and 760 torr c. -273°C and 1 atm
d. 0°C and 760 torr e. 0°C and 1 torr
4) A given mass of gas in a rigid container is heated from 100°C to 500°C. Which of the following responses best describes what will happen to the pressure of the gas?
a. The pressure will decrease by a factor of five.
b. The pressure will increase by a factor of five.
c. The pressure will increase by a factor of about two.
d. The pressure will increase by a factor of about eight.
e. The pressure will increase by a factor of about twenty-five.
5) A mixture of the gases neon and krypton is in a 2.00 liter container. The partial pressure of the neon is 0.40 atm and the partial pressure of the krypton is 1.20 atm. What is the mol fraction of neon?
a. 0.20 b. 0.25 c. 0.33 d. 0.60 e. 0.80
6) What volume of O2, collected at 22.0°C and 728 mmHg would be produced by the decomposition of 8.15 g KClO3? 2KClO3(s) -> 2KCl(s) + 3 O2(g)
a. 1.12 L b. 1.48 L c. 1.68 L d. 2.23 L e. 2.52 L
7) A balloon contains 0.1 moles of oxygen and 0.4 moles of nitrogen. If the balloon is at STP, what is the partial pressure of nitrogen?
a) 0.8 atm b) 0.7 atm c) 0.4 atm d) 0.995atm
8) The carbon atom in CSe2 will have _____ lone pair(s) and a ______molecular geometry.
a) zero, bent b) one, trigonal pyramidal c) zero, linear d) two, linear
9) Describe the bonding of nitrogen in NH2-in terms of a combination of hybrid atomic orbitals and molecular orbitals.
a) Nitrogen makes two sp3 sigma bonds and the lone pairs are in sp3 hybridized orbitals
b) Nitrogen makes two sp3 sigma bonds
c) Nitrogen makes two sp2 sigma bonds
d) Nitrogen makes two sp2 sigma bonds and the lone pars are in sp2 hybridized orbitals
10) What bond order would you predict fir P2?
a) 0 b) 2 c) 3 d) 1
11) What is the hybridization of iodine and fluorine in IF3?
a) Iodine is sp3 hybridized and fluorine is sp3 hybridized
b) Iodine is sp3d2 hybridized and the fluorine is sp hybridized
c) Iodine is sp3d hybridized and fluorine is sp2 hybridized
d) Iodine is sp3d hybridized and fluorine is sp3 hybridized
12) Which of the following molecules will have a net dipole moment?
1) BCl3 2) H2Te 3) GeO2 4) CH2Br2
a) B and D only b) A and D only c) B only d) all of them
13) How many sigma and pi bonds are present in the following molecule?
14) What is the rate of effusion for a gas that has a molar mass twice that of a gas that effuses at a rate of 3.62 mol/min?
a) 3.30mol/min b) 2.56 mol/min c) 1.90 mol/min d) 0.5 mol/min
15) Which of the following molecules is polar?
a) N2 b) P4 c) Cl2 d) CO2 e) H2O
16) Draw appropriate MO diagrams for the diatomic molecules Si2. For each, determine the bond order and whether the molecule is paramagnetic or diamagnetic.
AO MO AO
3ps* ______
3pp* ______
3p ______3p
3ps ______
3pp ______
3ss*______
3s ______3s
3ss ______