Answer
m = 2.13 x $10^{3}$ g
Work Step by Step
First we have to find the volume of the sphere and after that we find the mass.
$V_{sphere}$ = $\frac{4}{3}$ π $r^{3}$
radius is 1.58 in, or converted to cm it will be:
1.58 in = 1.58 in x $\frac{2.54 (cm)}{1 in}$
1.58 in = 4.01 cm
$V_{sphere}$ = $\frac{4}{3}$x 3.14 x$(4.01cm)^{3}$
$V_{sphere}$ = 270.61 $cm^{3}$
Now we find the mass: m = d x V
m = 7.88 $\frac{g}{cm^3}$ x 270.61 $cm^{3}$
m = 2,133 g or m = 2.13 x $10^{3}$ g
