1. Problems from end of chapter 11

2. A weather balloon has a volume of 750 mL when filled with helium at 8o C at a pressure of 380 torr. What is the final volume, in L, of the balloon when the pressure is 0.20 atm, the temperature is o C. and n remains constant?

3. 11. 86 A steel cylinder with a volume of 15. 0 L is filled with 50
11.86 A steel cylinder with a volume of 15.0 L is filled with 50.0 g of nitrogen gas at 25o C. What is the pressure in atmospheres of the N2 gas in the cylinder?

4. 11.94 Hydrogen gas can be produced in the lab through the reaction of magnesium metal with hydrochloric acid. When 12.0 g of Mg reacts, what volume in L of H2 gas is produced at 24o C and 835 torr?
Mg HCl  H2 (g) + MgCl2

5. 11. 102 A sample of an unknown gas with a mass of 3
A sample of an unknown gas with a mass of 3.24 g occupies a volume of 1.88 L at 748 torr and temp of 20.0o C. A) What is the molar mass of the gas? B) If the unknown gas is composed of 2.78g of C and rest is H, what is its molecular formula?