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Half-life and methods to determine order
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Single correct option
Difficulty 2 of 3
ck079
A zero order reaction has
k
=
5.0
×
1
0
−
3
mol
L
−
1
s
−
1
and
[
A
]
0
=
0.60
mol
L
−
1
. Its half-life is
A
60
s
B
120
s
C
138.6
s
D
333
s
Answer: A
For zero order
t
1/2
=
[
A
]
0
/
(
2
k
)
=
0.60/
(
2
×
5.0
×
1
0
−
3
)
=
60
s
. The value 120 s is the time for complete consumption,
[
A
]
0
/
k
.
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