This preview shows pages 1–4. Sign up to view the full content.
1 of 14
Chem 2A practice Midquarter II
Professor McCurdy
Name______________________________________________________
Student ID Number __________________________________________
Lab: TA Name
and
Time ______________________________________
Practice Second Midquarter Exam: Note that this practice exam is
much
longer than a real exam, but covers most kinds of questions on the
material in all of chapters 6, 8, and 9 of the 9
th
edition of the text
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document 2 of 14
Chem 2A practice Midquarter II
Professor McCurdy
I. Multiple Choice: (
clearly
circle the letter of the correct
answer)
1. Standard conditions of temperature and pressure (STP) are
a) 100
o
C, 1 atm.
b) 25
o
C, 760 mm Hg
c) 0 K, 760 mm Hg
d) 0
o
C, 760 mm Hg
e) none of these
2. Boyles law, known since 1662, is (where a is a constant)
a) V = a T and constant P
b) P = a/V at constant T
c) V = a n
Avogrado
at constant T and P
d) PV=nRT
e) none of these
3. In an ideal mixture of gases, the
partial
pressures, P
a
, of each of the
constituent gases
a) are each equal to n
a
RT/V where n
a
= number of moles of that gas
b) are each equal to n RT/V where n = total number of moles
c) are each equal to n RT/V
a
where V
a
= partial volume for that gas
d) satisfy P
a
V
a
= n
a
RT
e) none of these
4. Recalling the relation
M
RT
u
rms
3
=
from the kinetic theory of gases (you
may not be given this equation on the real exam), what is the rms spead of
H
2
at 25
0
C?
a) 1.92 x 10
3
cm/s
b) 0.96 x 10
3
cm/s
c) 0.96 x 10
3
m/s
d) 1.92 x 10
3
m/s
e) none of the above
3 of 14
Chem 2A practice Midquarter II
Professor McCurdy
5. The de Broglie relation,
!
/
h
p
=
connects which properties?
a) The wavelength of light absorbed and the momentum of a particle
b) The frequency and wavelength of light
c) The wavelength and the momentum of any particle
d) The frequency and the momentum of a photon
e) none of these
6. The energy of the nth state of a hydrogenlike atom is (
=
H
R
Rydberg
constant)
2
2
/
n
Z
R
E
H
n
!
=
(You may not be given this equation on the real
exam.) How much energy is required to ionize the hydrogen atom in its
ground state?
a)
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 04/23/2008 for the course CHEM 2A taught by Professor Guo during the Fall '08 term at UC Davis.
 Fall '08
 Guo

Click to edit the document details