1. A 250. mL sample of gas has a temperature of 24.5^oC and a pressure of 0.99 atm. What temperature would be needed for the same amount of gas to fit into a 500. mL flask at standard pressure? (Amount of moles is held constant)
 2. The pressure in a bicycle tire is 35.5 psi at 32.5^o C in Phoenix. You take the bicycle up to Flagstaff, where the temperature is 21.1 C. What is the pressure in the tire? (Volume and Amount of moles is held constant)

3. what would be the new pressure if 500 cm3 of gas at standard pressure is compressed to a volume of 250 cm3 (temperature and amount of moles is held constant)
I need help please please!! No links!