Suppose There Are 2 Moles of a Gas in a Container

Multiple Choice

Suppose there are 2 moles of a gas in a container of fixed size and the average spacing of molecules in the container is 4.0 nm.If an additional 14 moles of the gas are added to the container and thermal equilibrium is established,what is the new average spacing of the molecules?

A) 2.0 nm
B) 0.50 nm
C) 1.4 nm
D) 2.8 nm