Can anyone answer all of these for me quickly? And tell me how to do the work for it too? Thank you.

What is the mass of 8 moles of sodium atoms

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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?