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

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. $30.8 \mathrm {~g} / \mathrm { cm } ^ { 3 }$