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A__ is two or more substances that are together in the same place but are not chemically combined
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What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?
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Apiece of copper has a temperature of 75.6 0c. when the metal is placed in 100.0 grams of water at 19.1 0c, the temperature rises by 5.5 0c. what is the mass of the metal?
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