A measured mass of an unreactive metal was dropped into a small graduated cylinder half filled with water. The following measurement were made:
Mass of metal $= 25.200 g$
Volume of water before addition of metal $= 12.5 m L$
Volume of water after addition of metal $= 15.0 m L$
The density of the metal should be reported as:

10.0800 g / m L

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10.080 g / m L

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10.08 g / m L

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10.1 g / m L

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Solution

The correct option is B $10.1 g / m L$
$D e n s i t y = \frac{m a s s o f m e t a l}{V o l u m e o f m e t a l}$
$= \frac{25.200 g}{(15 - 12.5) m l}$
$∴ D e n s i t y o f m e t a l = 10.1 g / m l$

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