Answer
m = 1.45 x $10^{3}$ g
Work Step by Step
From formula for density
d = $\frac{m}{V}$ , we can write the formula to find the mass:
m = d x v
We can find the volume of silicon by applying formula for volume of circular cylinder:
$V_{circular cylinder}$ = $\pi$ $r^{2}$ h
Replace the values $\pi$, r, and h :
$V_{circular cylinder}$ = 3.14 x $(4 cm)^{2}$ x 12.40 cm
V = 622.976 $cm^{3}$
V = 622.98 $cm^{3}$
Now we can find the mass of silicon:
m = d x V
m = 2.33 $\frac{g}{cm^{3}}$ x 622.98 $cm^{3}$
m = 1451.5 g
m = 1.45 x $10^{3}$ g
