Question

Classify each of the following as a pure substance or a mixture:
Drag the appropriate items to their respective bins.

a road treatment (CaCl,)
a copper (Cu) pipe
a soft drink
propane (C, Hg)
A sandwich

Answer 1

pure substance: copper (Cu) pipe
mixture: road treatment (CaCl), soft drink, propane (C, Hg)
uncertain: A sandwich (depends on the ingredients)