how many grams of calcium must react with 41.5gram of atomic chlorine to produce calcium chloride
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First calculate the number of moles of calcium hydroxide in the 74 grams :
n
=
m
M
r
=
74
40
+
32
+
2
=
1
m
o
l
Therefore, providing sufficient hydrochloric acid is added, the maximum amount of calcium calcium chloride that can be formed is also 1 mole (in order to satisfy the mole ratio in the balanced chemical reaction).
But 1 mole of calcium chloride corresponds to a mass of
m
=
n
×
M
r
=
1
×
(
40
+
2
×
35
,
5
)
=
111 g
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