Using a ground-based telescope and a spectrometer, it has been found that sodium vapor is a major component of the thin atmosphere of Mercury. Its concentration is estimated to be about 1.0x10^5 atoms per cm^3
(a) Express this in moles per liter
(b) The maximum temperature of the atmosphre was measured by Mariner 10 to be about 970 ?. What is the approximate partial pressure of sodium vapor at that temperature?