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Chapter 1: Q. 57 (page 31)

The quantity called mass density is the mass per unit volume of a substance. What are the mass densities in SI units of the following objects?
a. A 215 cm3 solid with a mass of 0.0179 kg.
b. 95 cm3 of a liquid with a mass of 77 g

Short Answer

Expert verified

a. The mass density of the substance is 8.32 x 104 g/m3.
b. The mass density of the substance is 0.81 x 106 g/m3.

Step by step solution

01

Write the given information

Mass density is the mass per unit volume of a substance.

02

To determine the mass densities of the given substance

The SI unit of mass density is g/m3.
Let mass density is expressed as ρ


a. A 215 cm3solid with a mass of 0.0179 kg.
ρ=MassVolume=0.0179kg215cm3=0.0179×103g215×10-23m3=8.32x104g/m3

Thus, the mass density of the substance is 8.32 x 104 g/m3.

b. 95 cm3 of a liquid with a mass of 77 g
ρ=MassVolume=77g95cm3=77g95×10-23m3=0.81x106g/m3
Thus, the mass density of the substance is 0.81 x 106 g/m3.

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