Chapter 12 The Solid State - 12-7 Phase Diagrams - Applying Chemical Principles - Questions - Page 466: 2

$7.294\ g/cm^3$

Mass: $4\times 118.71\ g/mol\div 6.022\times 10^{23}\ atoms/mol=7.885\times10^{-22}\ g/cell$ Volume: $(583\times 10^{-10}\ cm)^2\times (318\times10^{-10}\ cm)=1.081\times10^{-22}\ cm^3/cell$ Density: $7.885\times10^{-22}\ g/cell\div 1.081\times10^{-22}\ cm^3/cell=7.294\ g/cm^3$