Name: D{ © fL‘ 3 Student number:
uOttawa
CHM3373 - Midterm exam - March 19, 2026
Length of exam: 1 hour and 15 minutes
Instructions: Please be sure you have all 8 pages. If you write in pencil, no part of the exam will be
considered for remarking. If you need extra Space, you may write on the backs of the pages, but
you must indicate that you are doing so. Show all work for full marks. This exam is closed book.
You are not allowed to access computers, phones, etc. See last page for formulae etc.
The university's policy on academic integrity and misconduct
is in effect. Students have the right to
write assignments and answer exam questions in the official
language of their choice, regardless of
the language of instruction.
question mark maximum
No.1 /4
No.2 /4
No.3 /17
No.4
/4
No.5 /6
No.6
12
No.7
/4
total
/31
, 1. (4 marks ) The bond length of 2Na'*F is 192.6 pm. (a) Calculate the value of the
rotational constant, B, in units of cm™'. (b) Calculate the spacing between lines in the pure
rotational spectrum of this molecule in units of Hz. Show your work for full marks.
8 *[f"fl—fl L= M ¥
(22,937 7F0) 1§, G584 03.4)
v i0(//:/: = .1, 64051 x5 B,
22895970+ (8998403
Mefe = (32 7325 xLo ‘Zé/(j
[0S F-xto 1 Ts
)?,
1 (2. 9975 " 4Y 6
102 )(
epe8 /72,
be C‘,L//ig’crw K
(@)B= O L/:Gq:ul
Speciy & eqed o 28
0.§F3F !
5= 2(‘0&{37%(%'!'):
(b) Line spacing =
2419 %0 H
uOttawa
CHM3373 - Midterm exam - March 19, 2026
Length of exam: 1 hour and 15 minutes
Instructions: Please be sure you have all 8 pages. If you write in pencil, no part of the exam will be
considered for remarking. If you need extra Space, you may write on the backs of the pages, but
you must indicate that you are doing so. Show all work for full marks. This exam is closed book.
You are not allowed to access computers, phones, etc. See last page for formulae etc.
The university's policy on academic integrity and misconduct
is in effect. Students have the right to
write assignments and answer exam questions in the official
language of their choice, regardless of
the language of instruction.
question mark maximum
No.1 /4
No.2 /4
No.3 /17
No.4
/4
No.5 /6
No.6
12
No.7
/4
total
/31
, 1. (4 marks ) The bond length of 2Na'*F is 192.6 pm. (a) Calculate the value of the
rotational constant, B, in units of cm™'. (b) Calculate the spacing between lines in the pure
rotational spectrum of this molecule in units of Hz. Show your work for full marks.
8 *[f"fl—fl L= M ¥
(22,937 7F0) 1§, G584 03.4)
v i0(//:/: = .1, 64051 x5 B,
22895970+ (8998403
Mefe = (32 7325 xLo ‘Zé/(j
[0S F-xto 1 Ts
)?,
1 (2. 9975 " 4Y 6
102 )(
epe8 /72,
be C‘,L//ig’crw K
(@)B= O L/:Gq:ul
Speciy & eqed o 28
0.§F3F !
5= 2(‘0&{37%(%'!'):
(b) Line spacing =
2419 %0 H
