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A crucible is known to weigh 24.3162 g. Three students in the class determine the weight of the crucible by repeated weighings on a simple balance. (A) Using the following information, which student has done the most accurate determination? (B) Which student has done the more precise determination?

Student Trial 1 Trial 2 Trial 3 Trial 4 Trial 5

A 24.8 24.0 24.2 24.1 24.3

B 24.5 24.3 24.5 24.4 24.3

C 24.8 24.9 24.8 24.9 24.8

10. A solid block of titanium that is 2.1 cm x 1.21 cm x 6.5 mm has a mass of 7.515 grams.

What is the density in g/cm3?

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