The answer is: "0.3125 cm³ " ; or; write as: "13/40 cm³ " .
________________________________________________________
1 g * (1 cm³ / 3.2g) = __?___ cm³ ;
The units of "g" cancel ;
and we have: (1/3.2) cm³ ;
= (1 ÷ 3.2) cm³ ;
= 0.3125 cm³ ; or; write as: 13/40 cm³ .
_____________________________________