Which set of procedures and observations indicates a chemical change?
(1) ethanol is added to...
Chemistry, 16.01.2020 02:31 Harambe659
Which set of procedures and observations indicates a chemical change?
(1) ethanol is added to an empty beaker and the ethanol eventually disappears.
(2) a solid is gently heated in a crucible and the solid slowly turns to liquid.
(3) large crystals are crushed with a mortar and pestle and become powder.
(4) a cool, shiny metal is added to water in a beaker and rapid bubbling occurs.
Answers: 3
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