## Materials Science and Engineering: An Introduction

$1.21$ x $10^{28}$ m$^{3}$
We find: $a = 2R\sqrt{2}$ $V = a^{3} = (2R\sqrt{2})^3 = 16\sqrt{2}R^{3}$ $R = .175*10^{-9}$ m $V = 1.21*10^{-28}$ m$^3$