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Question
Chemistry
If 27 g of water is formed during complete combustion of pure propene (C3H6), the mass of propene burnt is
Q. If
27
g
of water is formed during complete combustion of pure propene (
C
3
H
6
), the mass of propene burnt is
2509
202
KEAM
KEAM 2016
Some Basic Concepts of Chemistry
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A
42 g
13%
B
21 g
47%
C
14 g
0%
D
56 g
27%
E
40 g
27%
Solution:
Required reaction:
(Propene)
(
3
×
12
+
6
=
42
)
C
3
H
6
+
2
9
O
2
⟶
3
C
O
2
+
(
3
×
18
=
54
)
3
H
2
O
Given,
H
2
O
(
formed
)
=
27
g
To find the mass of propene,
The mass ratio between
C
3
H
6
and
H
2
O
=
42
:
54
∵
54
g
of
H
2
O
require
=
42
g
C
3
H
6
∴
27
g
of
H
2
O
require
=
54
42
×
27
=
21
g
⋅
C
3
H
6