What is the molecular weight of 3590 g of gas in a 586 l

Question

What is the molecular weight of 35.90 g of gas in a 5.86 L container at 441.0 K with a pressure of 5.83 atm?

99.2 g of Ar is placed in a 490.0 mL container at -10.0 ^oC. What is the pressure inside the container (in torr)?

Calcium carbonate, CaCO₃(s), decomposes upon heating to give CaO(s) and CO₂(g). A sample of CaCO₃ is decomposed, and the carbon dioxide is collected in a sealed 250 mL flask. After the decomposition is complete, the gas has a pressure of 1.4 atm at a temperature of 33°C. How many moles of CO₂ gas were generated? (Ideal gas equation: PV = nRT.)