Hint
Unknown C
Unknown C is a white, chalk-like powder that is not
soluble in water. When heated in a container that has
been
fitted with a stopper and gas tube, it gives off a gas
that is not very soluble in water and will not support
combustion. When water is added to the cooled, white
residue left behind the substance reacts and gives off
heat.
Unknown
Unknown
B
Unknown
с
Element
Compound
Mixture
Evaluate
Physical Science > Elements, Compounds, and Mixtures
—
2.10 S.A.C