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Which of the following is an example of a physical, rather than a chemical, change?
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20 grams of water. she poured out 15 grams. which of the following physical properties of the water changes? a .boiling point b. density c .electrical conductivity d .volume
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2.38g of black copper (ii) oxide is completely reduced by hydrogen to give copper and water. what are the masses of copper and water formed? ?
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Which of the following is an example of a physical, rather than a chemical, change?...
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