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13 March, 11:09

A graduated cylinder contains 20.0 mL of water. An irregularly shaped object is placed in the cylinder, and the water level rises to the 31.2-mL mark. If the object has a mass of 7.42 g, what is its density?

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  1. 13 March, 11:18
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    According to Archimedes principle, when an object is submerged in water, it displaces a volume of water equivalent to the volume of the object. Therefore, the object's volume is:

    31.2 - 20 = 11.2 mL

    Next, we know that the density of any substance is the ratio of the substance's mass to its volume, so the density is:

    Density = mass / volume

    Density = 7.42 / 11.2

    Density = 0.66 grams per mL
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