14) 3CaCl2 # of molecules:
# of elements:
# of
Name of element:
atoms:
Total # of atoms:
The #3 is a
(coefficient or subscript)

the density of gold = 19.3 g/cm3

the relation between density and mass and volume is

density = mass / volume

given :

mass of gold = 13 g

density = 13g / volume = 19.3

volume = 13 /19.3 = 0.67 cm^3

thus volume of gold nugget = 0.67 cm^3

there are two significant figures.