4) The length of a rectangle is 2 cm less than 7 times
the width. The perimeter is 60 cm. Find the width and
length.

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?