Fermi
·
Concept Library
·
Courses
·
Books
·
Problems
·
Simulations
·
Math Wiki
·
High School
Fermi
›
Problems
Chemistry
Chemistry
Problem
A
6.25
g
6.25\,\text{g}
6.25
g
sample of cobalt(II) chloride hydrate is heated strongly until all water is removed, leaving
3.40
g
3.40\,\text{g}
3.40
g
of anhydrous CoCl
2
_2
2
. What is the empirical formula of the original hydrate? a)
CoCl
2
⋅
4
H
2
O
\text{CoCl}_2\cdot4\text{H}_2\text{O}
CoCl
2
⋅
4
H
2
O
b)
CoCl
2
⋅
3
H
2
O
\text{CoCl}_2\cdot3\text{H}_2\text{O}
CoCl
2
⋅
3
H
2
O
c)
CoCl
2
⋅
6
H
2
O
\text{CoCl}_2\cdot6\text{H}_2\text{O}
CoCl
2
⋅
6
H
2
O
d)
CoCl
2
⋅
8
H
2
O
\text{CoCl}_2\cdot8\text{H}_2\text{O}
CoCl
2
⋅
8
H
2
O
Browse the problem library