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the law of conservation of mass states that the mass of all substances before a physical change equals the mass of all the substances after the change
false - chemical
using oxyten to separate molten copper sulfide into copper and sulfur dioxide is a phusical change
false - chemical
three examples of physical change are
boiling of water, bursting of a balloon, and crumpling a piece of paper
when two or more substances are combined so each substance can be separated by physical means, the result is
you are given a flask that contains 250 ml of a clear brown liquid. you shine a light through the liquid, and no light beam is visible. in the following list of items, record a y if that item could be a valid definition for the liquid. record a N if that item could not be a valid definition
c solution of a solid in a liquid
solution of a liquid in a liquid
when sugar and salt are mixed together, the properties of the final substances are ___________those of the beginning substances
the same as
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