In the image below, the dots represent gas molecules. when the wall separating the chambers is removed, how will the movement of molecules change?

Answer : The correct option is, (C)

Explanation :

Gas is one of the state of matter in which particles have a lot of spacing between them and are very far apart. The inter-molecular forces of attraction between the particles is the weakest.  

As we know that to maintain the equilibrium in the given chamber the molecules will flow from the right chamber to the left chamber and from left chamber to right chamber until the both chamber have equal number of molecules.

Hence, the correct option is, (c)

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