Nitrogen dioxide (46.0 g mol–1) forms from nitric oxide (28.0 g mol–1) and oxygen (32.0 g mol–1):  2 NO(g) + O2(g) → 2 NO2(g) What is the volume change of the system when 36.0 g of NO2 is formed at a pressure of 1 atm and 300 K?   –19.2 L    –9.6 L   +14.4 L

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Q: mole fraction of the methanol?

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