Question

the mass of an ion cube having an edge length 1.8 cm is 70 g. find it's density

Answer 1

Formula for Density (D) = $\frac{mass(M)}{volume(V)}$

hence D=$\frac{1.8*1.8*1.8}{70}$

ans= 12.002 $\frac{g}{cm}$

Answer 2

density = (mass)/(volume)
            =70/(1.8)³ = 70/5.832 = 12.002 gm/cm³