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Shreyas Pai
Subject: Chemistry
, asked on 1/5/15
For a first order reaction the time needed is 30min for the concentration to fall from 1.5M to 0.9M. The time needed for the fall in the concentration from 0.9M to 0.54M will be
Answer
0
Priya Rathi
Subject: Chemistry
, asked on 18/8/16
pls explain the use of molecularity
Answer
2
Essa Amir Hamza Khan
Subject: Chemistry
, asked on 22/3/18
Question 15 what happens when boric acid added to the water second borax is heated strongly
Answer
1
Sanskruti
Subject: Chemistry
, asked on 13/8/18
help me asap
Answer
2
Siddhanth Chauhan
Subject: Chemistry
, asked on 7/10/18
Plzz give the answer of Q.no 5.3
Q5.3 Consider the reaction 2A + 2B →2C + D. From the following data, calculate the order and rate constant of the reaction.
[Al
0
] / M
[Bl
0
] /M
r
0
/Ma
–1
0.488
0.244
0.244
0.160
0.160
0.320
0.24
0.06
0.12
Answer
1
Siddhanth Chauhan
Subject: Chemistry
, asked on 2/6/18
Plzz solve this
Q.5.25 The rate constant of a first order reaction at 25
°
C is 0.24
s
-
1
. If the energy of activation of the reaction is 88 kJ
m
o
l
-
1
, at what temperature would this reaction have rate constant of
4
×
10
-
2
s
-
1
?
(283.7 K)
Answer
1
Gautami
Subject: Chemistry
, asked on 29/3/17
Plzz solve
Answer
1
Anup Kulkarni
Subject: Chemistry
, asked on 29/6/19
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c
t
i
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n
:
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2
(
g
)
+
2
H
2
(
g
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⇌
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2
H
4
(
g
)
i
s
a
20
P
0
2
(
b
)
20
P
0
2
3
c
1
20
P
0
2
d
3
20
P
0
2
This one pl
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N
2
(
g
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+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
a
n
d
N
2
(
g
)
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2
H
2
(
g
)
⇌
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2
H
4
(
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2
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n
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2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
i
s
a
20
P
0
2
(
b
)
20
P
0
2
3
c
1
20
P
0
2
d
3
20
P
0
2
Answer
1
Paras Panchal
Subject: Chemistry
, asked on 22/6/19
Solve 45 plzz
45. In a 1st order reaction the fraction of molecules at 450°C having sufficient energy (or fraction of effective collisions) is 1.92 × 10
-16
. What is activation energy value of this reaction?
(a) 21.757 × 10
2
J mole
–1
(b) 21.757 x 10
3
J mole
–1
(c) 21.75 x 10
–2
J mole
–1
(d) None
Answer
1
Siddhanth Chauhan
Subject: Chemistry
, asked on 12/5/18
I want the answer of 5.2
Q5.2 Consider the reaction
3
I
aq
+
S
2
O
8
2
aq
→
I
3
-
aq
+
2
SO
4
2
-
aq
At
a
particular
time
t
,
d
SO
4
2
-
dt
=
2
.
2
×
10
-
2
M
/
s
.
What
are
the
value
of
(
a
)
-
d
I
-
dt
(b)
-
d
S
2
O
8
2
-
dt
(c)
d
I
3
-
dt
at the same time?
(a) 3.3 × 10
–2
M/s (b) 1.1 × 10
–2
M/s
(c) 1.1 × 10
–2
M/s
Answer
2
Siddhanth Chauhan
Subject: Chemistry
, asked on 7/10/18
Consider the reaction 2A + B → 2C. Suppose that at a particular moment during the reaction, rate of disappearance of A is 0.076 M/s, (a) What is the rate of formation of C? (b) What is the rate of consumption of B? (c) What is the rate of the reaction?
[(a) 0.076 M/s (b) 0.038 M/s (c) 0.038 M/s]
Answer
1
Swanand Wirkar
Subject: Chemistry
, asked on 19/8/19
Which of the following are true
Answer
1
Karan
Subject: Chemistry
, asked on 30/8/17
Solve:
Answer
2
Pranav
Subject: Chemistry
, asked on 10/10/18
What is pseudo first order reaction ???
Answer
1
Sanskruti
Subject: Chemistry
, asked on 13/8/18
54 th please
Answer
2
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What are you looking for?
Q5.3 Consider the reaction 2A + 2B →2C + D. From the following data, calculate the order and rate constant of the reaction.
0.244
0.244
0.160
0.320
0.06
0.12
Q.5.25 The rate constant of a first order reaction at 25C is 0.24 . If the energy of activation of the reaction is 88 kJ , at what temperature would this reaction have rate constant of ?
(283.7 K)
45. In a 1st order reaction the fraction of molecules at 450°C having sufficient energy (or fraction of effective collisions) is 1.92 × 10-16. What is activation energy value of this reaction?
(a) 21.757 × 102J mole–1
(b) 21.757 x 103 J mole–1
(c) 21.75 x 10–2 J mole–1
(d) None
Q5.2 Consider the reaction
(b) (c) at the same time?
(a) 3.3 × 10–2 M/s (b) 1.1 × 10–2 M/s
(c) 1.1 × 10–2 M/s
[(a) 0.076 M/s (b) 0.038 M/s (c) 0.038 M/s]