American Chemical Society

The two liquids in the bottle are isopropyl alcohol (D = 0.79 g mL-1) and salt water (17% NaCl by weight, D = 1.12 g mL-1). The two plastics in the bottle are low density polyethylene (LDPE, D = 0.93 g mL-1) and polystyrene (PS, D = 1.05 g mL-1). Because salt water … ................
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