Can someone please help me with a flame lab? If you can then I can send the link in the replies or whatever works ( It is Chemistry by the way) I will give lots of points and branliest

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?