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You are in a labratory conducting an experiment using an unknown compound containing carbon, hydrogen, and oxygen. You take 7.26 grams of the unknown compound and burn it completely in oxygen gas. You measure that 2.7 grams of liquid water are formed and collect 12.5 liters of carbon dioxide gas over water, much like the experiment that you did for the R-Lab. The temperature when you were collecting the gas was 26 degrees Celsius and the barometric pressure was 652 mmHg. You were able to adjust the eudiometer so the height above the water was 0 (h=0). The vapor pressure of water at this temperature is 25.209 mmHg. a. Determine the empirical formula of the unknown compound. b. In a different experiment, 10.47 grams of the gaseous sample of the unknown gaseous compound was found to occupy 2.61 L at 425 C and 722 mmHg. Determine the molecular formula for the unknown compound.

- August 24, 2022 - Edwin Tunner

You are in a labratory conducting an experiment using an unknown compound containing carbon, hydrogen, and oxygen. You take 7.26 grams of the unknown compound and burn it completely in oxygen gas. You measure that 2.7 grams of liquid water are formed and collect 12.5 liters of carbon dioxide gas over water, much like the experiment that you did for the R-Lab. The temperature when you were collecting the gas was 26 degrees Celsius and the barometric pressure was 652 mmHg. You were able to adjust the eudiometer so the height above the water was 0 (h=0). The vapor pressure of water at this temperature is 25.209 mmHg.

a. Determine the empirical formula of the unknown compound.

b. In a different experiment, 10.47 grams of the gaseous sample of the unknown gaseous compound was found to occupy 2.61 L at 425 C and 722 mmHg. Determine the molecular formula for the unknown compound.

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