examine the following scales.

the correct reading to all possible significant figures is:

1.2 g
1.012 g
1.200 g
11.20 g

your answer is a. the enthalpy of formation for a pure element in its standard state is always positive.

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