At what radius in the H atom does the radial distribution function ofthe ground state have (a) 50 per cent, (b) 75 per cent of its maximum value.

The solid xy decomposes into gaseous x and y: xy(s) m x(g) + y(g) kp = 4.1 (at 0 °c) if the reaction is carried out in a 22.4 l container, which initial amounts of x and y will result in the formation of solid xy?