The Mass of an Object Is Equal to Its Density $D$

question 14

Multiple Choice

The mass of an object is equal to its density times its volume, or m = DV.
a. Solve this equation for $D$ .
b. The mass of a sample of iron ore is $9.92$ grams and its volume is $3.1 \mathrm {~cm} ^ { 3 }$ . Find the density of the o Round to one decimal place.

• A) a. \(D = m - V\)
• b. \(6.8 \mathrm {~g} / \mathrm { cm } ^ { 3 }\)
• B) а. \(D = \frac { V } { m }\)
• b. \(0.3 \mathrm {~g} / \mathrm { cm } ^ { 3 }\)
• C) a. \(D = \frac { m } { V }\)
• b. \(3.2 \mathrm {~g} / \mathrm { cm } ^ { 3 }\)
• D) a. \(D = m V\)
• b. \(30.8 \mathrm {~g} / \mathrm { cm } ^ { 3 }\)

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Definitions:

Transmission Electron Micrograph

An image produced using a transmission electron microscope to explore the minute structures within cells and tissues.

Light Micrograph

An image produced using a light microscope, allowing for the visualization of small structures not visible to the naked eye.

Electron Microscope

A type of microscope that uses a beam of electrons to create an image of the specimen, allowing for much higher resolution than light microscopes.

Light Microscope

An optical instrument using visible light and lenses to magnify small objects, allowing for the observation of cellular structures.