Two large, rigid chambers containing an ideal gas are connected by a narrow tube that allows the gas to flow freely. Chamber A is maintained at 400 K, and Chamber B at 300 K. After the system reaches steady state, the pressure throughout is 1.0 × 10^5 Pa. What is the ratio of the number density (molecules per unit volume) in Chamber B to that in Chamber A?
a) 1.78
b) 1.33
c) 0.75
d) 1.00