Can someone please help me please?

Calculate the number of moles of ethane in 100 grams

Building glycogen from glucose molecules is an example of

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?