Classify each of the following as a pure substance or a mixture:
a road treatment (CaCl,)
a copper (Cu) pipe
a soft drink
propane (C, Hg)
A sandwich
a road treatment (CaCl) - mixture
a copper (Cu) pipe - pure substance
a soft drink - mixture
propane (C, Hg) - mixture
A sandwich - mixture
a road treatment (CaCl) - pure substance (calcium chloride)
a copper (Cu) pipe - pure substance (copper)
a soft drink - mixture (combination of various ingredients such as water, sugar, flavorings, carbon dioxide)
propane (C, Hg) - pure substance (propane)
A sandwich - mixture (combination of various ingredients such as bread, meat, cheese, vegetables)