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Chemistry
Chemistry
Problem
Which of the following substances are blue? a.
Fe
(
BO
2
)
2
\text{Fe}(\text{BO}_2)_2
Fe
(
BO
2
)
2
b.
CoAl
2
O
4
\text{CoAl}_2\text{O}_4
CoAl
2
O
4
c.
Co
(
BO
2
)
2
\text{Co}(\text{BO}_2)_2
Co
(
BO
2
)
2
d.
NaCoPO
4
\text{NaCoPO}_4
NaCoPO
4
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