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18.72 g of a substance 'X, occupies 1.81 cm³. what will be its density measured in correct significant figures?

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10.3 g cm^-3

10.34 g cm^-3

10.4 g cm^-3

10.3425 g cm^-3

answer is A.

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Detailed Solution

$Density = \frac{Mass}{Volume} = \frac{18 .72}{1 .81} = 10 .34 g {cm}^{- 3}$
Since, volume contains 3 significant figures, hence, answer will be 10.3 g cm^-3.

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