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Inorganic Syntheses: v. 11 by William Lee Jolly

By William Lee Jolly

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2A Determine the concentration (in µg m - 3 ) for N2O at a mixing ratio of 311 ppb at p = 1 atm and T = 298 K. 3A A typical global concentration of hydroxyl (OH) radicals is about 106 molecules cm - 3 . What is the mixing ratio corresponding to this concentration at sea level and 298 K? 4A Measurements of dimethyl sulfide (CH3SCH3) during the Aerosol Characteriza­ tion Experiment-1 (ACE-1) conducted November-December 1995 off Tasmania 20 THE ATMOSPHERE were in the range of 250-500 ng m-3 . Convert these values to mixing ratios in ppt at 298 K at sea level.

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The sum of the oxidation states must be zero for an electrically neutral compound. For an ion, the sum must equal the charge of the ion. For example, the sum of oxidation states for the nitrogen and hydrogen atoms in NH+4 is + 1 , and the oxidation state of nitrogen is —3. For NO-3, the sum of oxidation states is —1. Since oxygen has an oxidation state of —2, nitrogen must have an oxidation state of +5. Sometimes, oxidation states are indicated with roman numerals, for example, the sulfur atom in SO 2 - 4 is +VI.

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