In the equation - 8Fe + S8 --> 8 FeS

How many Fe atoms are there in 8 FeS

4.81 * 10^24

Explanation:

we know that:

no. of atoms = moles * avogadro number

no. of moles = 8 * 6.022* 10^23

no. of moles = 4.81 * 10^24

am i too late?

explanation:

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