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| many common suermarket products have very simple chemical compositions |
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1.11 the chemical reaction between a copper penny and nitric acid |
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| the dissolved copper produces the blue-green solution; the reddish brown gas produced is nitrogen dioxide. |
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1.12 separation by filtration |
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| a mixture of a solid and a liquid is poured through a porous medium, in this case filter paper. The liquid passes through the paper while the solid remains on the paper. |
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| a simle aaratus for the separation of a sodium chloride solution (salt water) into its comonents. Boiling the solution evaporates the water, which is condensed, then collected in the receiving flask. Agter all the water has boiled away, pure sodium chloride remains in the boiling flask. |
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1.14 separation of ink into coonents by aper chromatography |
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| water begins to move up the paper. Water moves past the ink spot, dissolving different components of the ink at different rates. Water has spearated the ink into its several different components. |
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| the volume occupied by a cube that is 1 m on each edge is a cubic meter, 1 m^3 . Each cubic meter contains 1000 dm^3. A liter is the same volume as a cubic decimeter, 1 l = 1 dm^3. Each cubic decimeter contains 1000 cubic centimeters, 1 dm^3 = 1000 cm^3. Each cubic centimeter equals a milliliter, 1 cm^3 = 1 mL |
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