Question

1.) At what temperature (in °C) would one liter of phosphorus trifluoride gas, PF3, have a mass of 3.954 g, if the gas pressure is 0.9220 atm? Assume that the gas behaves ideally.

2.)A gas in a container has an initial pressure of 0.599 atm. A chemical change occurs that consumes a quarter of the molecules originally present and forms four new molecules for every threeconsumed. Determine the new pressure in the container if the volume of the container and the temperature are unchanged.

_________ atm

3.)A gaseous hydrocarbon, in a volume of 21.2 L at 391 K and a pressure of 3.35 atm, reacts in an excess of oxygen to give 119.7 g of H₂O and 194.8 g of CO₂. Determine the molecular formula of the hydrocarbon.

Answer 1