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How many moles of air are there in a human lung with a volume of 2.4 l at stp? explain your answer
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Identify the electromagnets with poles that are reversed from the electromagnet shown above
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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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Chemistry, 22.06.2019 16:00
About 3% of the water on earth is freshest. only about 40% of that freshwater is available for human use. why is so much freshwater unavailable for human use?
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A hydrogen atom absorbs a photon of visible light and its electron enters the n = 4 energy level. Ca...
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