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Byju's Answer
Standard IX
Chemistry
Atomic Mass and Atomic Mass Unit
Active mass o...
Question
Active mass of 5 g CaO:
A
56
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B
1
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C
3.5
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D
2
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Solution
The correct option is
C
1
Active mass is generally the concentration of reacting substance in
m
o
l
/
L
.
Active mass for solids is always taken as
1
.
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5
Similar questions
Q.
Active mass of
5
g
C
a
O
is:
Q.
10.0 g of
C
a
C
O
3
on heating gave 4.4 g of
C
O
2
and x g of
C
a
O
. Applying the law of conservation of mass, calculate the mass of
C
a
O
.
Q.
For the reaction
C
a
C
O
3
(
s
)
⇋
C
a
O
(
s
)
+
C
O
2
(
g
)
,
the pressure of
C
O
2
(
g
)
depends on
Q.
Temporary hardness is due to bicarbonates of
M
g
2
+
and
C
a
2
+
. It is removed by addition of CaO as follows:
C
a
(
H
C
O
3
)
2
+
C
a
O
→
2
C
a
C
O
3
+
H
2
O
Mass of CaO required to precipitate
2
g
C
a
C
O
3
Q.
For the reaction
A
+
2
B
→
C
+
D
if active mass of
A
is kept constant and active mass of
B
is tripled. the rate of reaction will become:
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