(1) The volume of spilled water is the volume of the cover. As can be seen from the figure,

V cover =V water =17cm3;

Density of this material:

ρ pot = ρ pot =m pot v pot = 56.1g17cm3 = 3.3g/cm3;

(2) The volume of materials used in teapot:

∑ρ= mV，

∴V pot =m pot ρ pot =181.5g3.3g/cm3 = 55cm3.

Answer: (1) The density of this material is 3.3g/cm3；; ;

(2) The volume of the material used in this teapot is 55cm3. ..