What element is represented in this model of the atomic number is 3
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Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?
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2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here
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