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How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles
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Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?
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Which sentence about particles in matter is true? a. atoms are present in solids and liquids but not in gases. b. the particles of matter are in constant motion. c. the same kinds of atoms are found in different elements. d. when a solid changes to a liquid, the sizes of the particles change.
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In a copper wire, a temperature increase is the result of which of the following
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A flame in a sealed container will go out. Explain what you know about combustion reactions to expla...
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