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8. Calculate the density of an unknown metal at 0sc if 5.52 grams of ice occupies a volume of 6.95 mL a. 1.00 g/mL b. 0.90 g/mL c. 1.10 g/mL d. 0.80 g/mL e. 44 g/mlL What is the specific heat of a substance if 25 grams rises in temperature from 10°C to 25°C with the addition of 280 calories of energy? 9. 2 a. 0.0033 cal/(g C) b. 0.75 cal/(g°C) c. 1.33 cal/(g°c) d. 30 cal/(e ) e. 833 cal/(g ) 0 10. A laser beam travels a distance of 52120 m in 0.0002 seconds. Wich one of the 9 following is the best expression (in scientific notation) for the velocity of the beam? Express your answer in the proper number of significant figures. a. 1.21x108 m/s b. 3x108 m/s c. 3.84x108 m/s d. 3.84x109 m/s e. 3.8x109 m/s
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