1) 362.11 g of O2 are contained in a 3.00 L high pressure tankat a temperature of 186°C. What is the pressure of the gas intorr?

2) A gas has a given volume. The moles of gas are doubled thenthe pressure is 1/3 of the original pressure. After the pressurechange, the Kelvin temperature quadruples (increases 4 times of theoriginal Kelvin temperature). By how much has the volume changed?Be specific (i.e. the volume is 1/3 of the original volume, thevolume is 8 time greater, etc.). If you need more information toanswer, explain what information is needed.

3) A helium balloon has a volume of 2.54 L at 1.04 atm and24^oC. The balloon is then released. Calculate the volumeof the balloon (in L) when the pressure is 312 torr and thetemperature is–47^oC.

4) A vapor occupies a volume of 237.2 mL at a temperature of90.6°C and a pressure of 734.6 torr. The mass of the condensedvapor is 0.978 g. Calculate the molar mass of the vapor (hint: Usethe ideal gas law to find the number of moles).

5) A chemist mixed 10.00 g of a sodium carbonate solution with10.00 grams of a hydrochloric acid solution in an open beaker. Thereaction mixture fizzed. The final mass of the mixture was 19.31 g.Did this reaction violate the Law of Conservation of Mass? Why orwhy not? Be sure to explain your answer for full credit (hint –think common sense).