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Find the mass, in grams, of 5.00*10^23 molecules of f2

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?

What two categories of toxins were present in the air at dish,texas as a result of the gas pipelines that pass through the area