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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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Ahelium balloon contains 16.9 l of helium at stp. how many atoms of helium are in the balloon
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Animals have to eat other things to get their food, but plants can make it themselves.
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