Several small molecules (besides water) are important in biochemical systems: O 2 , CO, CO 2 ,

Question:

Several small molecules (besides water) are important in biochemical systems: O₂, CO, CO₂, and NO. You have isolated one of these and to identify it you determine its molar mass. You release 0.37 g of the gas into a flask with a volume of 732 mL at 21°C. The gas pressure in the flask is 209 mm Hg. What is the unknown gas?

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