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Calculate the molar mass of aluminum oxide (al2o3). express your answer to four significant figures.
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Aradio signal from a gps satellite take only about 0.067 seconds to reach a gps reciever. if the speed of light is about 300,000km/s, then approximately how far away is the reciever from from the satellite?
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A 2.50 cm cube of copper metal has a mass...
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