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Return to Maths for Chemistry 3e Student Resources
Chapter 12 Multiple choice questions
Quiz Content
*
not completed
.
Consider the Bragg equation
nλ = 2d
sin
θ
. Which of the answers
a
-
d
below is the correct result of rearranging the equation to make
θ
the subject?
θ
=
sin
−
1
(
2
d
n
λ
)
correct
incorrect
θ
=
sin
−
1
(
n
λ
2
d
)
correct
incorrect
θ
=
sin
−
1
(
2
d
)
n
λ
correct
incorrect
θ
=
(
n
λ
2
d
)
sin
correct
incorrect
*
not completed
.
Consider the Debye-Hückel equation:
log
γ
=
-
A
z
+
z
-
I
.
Which of the answers
a
-
d
below is the correct result of rearranging the equation to make ionic strength
I
the subject?
I
=
(
log
γ
)
2
A
z
+
z
−
correct
incorrect
I
=
(
A
z
+
z
−
+
log
γ
)
2
correct
incorrect
I
=
log
γ
A
z
+
z
−
correct
incorrect
I
=
(
log
γ
A
z
+
z
−
)
2
correct
incorrect
*
not completed
.
Consider the Nernst equation,
E
=
E
⦵
+
R
T
n
F
ln
[
O
]
[
R
]
.
Which of the answers a-d below is the correct result of rearranging the equation to make concentration [O] the subject?
[O]=[R]
exp
(
n
F
(
E
−
E
0
)
R
T
)
correct
incorrect
[O]=[R]
exp
(
(
E
−
E
0
)
−
R
T
n
F
)
correct
incorrect
[O]=
exp
(
n
F
(
E
−
E
o
)
R
T
)
−
[R]
correct
incorrect
[O]=
exp
(
n
F
(
E
−
E
o
)
R
T
)
+
[R]
correct
incorrect
*
not completed
.
Consider the van't Hoff isotherm, ∆
G
= -
RT
ln
K
. Which of the answers
a
-
d
below is the correct result of rearranging the equation to make
K
the subject?
exp
(
∆
G
+
RT
)
correct
incorrect
exp
[
-
∆
G
RT
]
correct
incorrect
-
exp
[
∆
G
RT
]
correct
incorrect
exp
(
∆
G
)
-
R
T
correct
incorrect
*
not completed
.
Rearrange the expression pH = -log [H
+
] to make the concentration term the subject. Which of the following is the correct answer?
exp(-pH)
correct
incorrect
10
pH
correct
incorrect
10
-pH
correct
incorrect
exp(pH)
correct
incorrect
*
not completed
.
Consider the Clausius-Clapeyron equation,
ln
(
p
2
p
1
)
=
−
Δ
H
R
(
1
T
2
−
1
T
2
)
.
Which of the answers
a
-
d
below is the correct result of rearranging the equation to make
p
2
the subject?
p
2
=
p
1
exp
(
−
Δ
H
R
(
1
T
2
−
1
T
2
)
)
correct
incorrect
p
2
=
−
p
1
exp
(
Δ
H
R
(
1
T
2
−
1
T
2
)
)
correct
incorrect
p
2
=
exp
(
Δ
H
R
(
1
T
2
−
1
T
2
)
)
−
p
1
correct
incorrect
p
2
=
exp
(
Δ
H
R
(
1
T
2
−
1
T
2
)
)
/
p
1
correct
incorrect
*
not completed
.
The volume
V
of a code of height h and radius r is,
π
r
2
h
3
Which of the answers
a
-
d
below is the correct result of rearranging the equation to make the radius
r
the subject?
r
=
3
V
π
h
correct
incorrect
r
=
π
h
3
V
correct
incorrect
r
=
π
h
3
V
correct
incorrect
r
=
3
V
π
h
correct
incorrect
*
not completed
.
The Schulze-Hardy rule relates the critical coagulation concentration (CCC) of a colloid, the valence of extra counterionic electrolytes (
z
), with a simple mathematical relationship of [CCC] =
k
/
z
6
.
Which of the answers
a
-
d
below is the correct result of rearranging the equation to make the charge
z
the subject?
z
=
k
6[CCC]
correct
incorrect
z
=
k
[CCC]
6
correct
incorrect
z
=
k
[CCC]
correct
incorrect
z
=
k
[CCC]
correct
incorrect
*
not completed
.
Two atoms connected by a chemical bond often act much like a spring. The bond force constant
k,
the reduced mass
μ
, and the frequency of oscillation
ω
are connected
k
=
μω
2
.
Which of the answers
a
-
d
below is the correct result of rearranging the equation to make the frequency
ω
the subject?
ω
=
k
μ
correct
incorrect
ω
=
k
−
μ
correct
incorrect
ω
=
k
μ
correct
incorrect
ω
=
(
k
μ
)
2
correct
incorrect
*
not completed
.
Consider a right-angled triangle. The length of the hypotenuse is
h
. The length of the adjacent
a
is given as
a
=
h
sin
θ
.
Which of the answers
a
-
d
below is the correct result of rearranging the equation to make the angle
θ
?
θ
=
sin
−
1
(
a
−
h
)
correct
incorrect
θ
=
sin
−
1
(
a
+
h
)
correct
incorrect
θ
=
sin
−
1
(
h
a
)
correct
incorrect
θ
=
sin
−
1
(
h
a
)
correct
incorrect
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