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Classify each of the following as a pure substance or a mixture:

a cheese sandwich
an iron (Fe) nail
a soft drink
propane (C3H8)
A salt substitute (KCl)

1 answer

a cheese sandwich - mixture
an iron (Fe) nail - pure substance
a soft drink - mixture
propane (C3H8) - pure substance
A salt substitute (KCl) - pure substance
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