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The observed density of hydrogen cyanide at 26 °C and 1.00 atm is 1.210 g / L. a.) Calculate the apparent

molecular weight of the gas. b.) Assume that the hydrogen cyanide gas contains both hydrogen cyanide (HCN) and the hydrogen cyanide dimer (HCN)2. Determine the fraction of this gas that is (HCN)2.

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