Question

The radius of the base of a cylindrical silo is 28 feet. If the distance from point B to the silo is 53 feet, what is the distance from point B to point A, a point of tangency?

A 5.0 L vessel holds 3.0 mol N2, 2.0 mol F2, and 1.0 mol H2 at 273 K. What is the partial pressure of fluorine?

At 298 K, you collect 0.5 L of oxygen over water that has a total pressure of 150 kPa. What is the partial pressure of oxygen? (The partial pressure of water vapor at 298 K is 3.6 kPa.)

A tank of gas has partial pressures of nitrogen and oxygen equal to 1.61 × 104 kPa and 4.34 × 103 kPa, respectively. What is the total pressure of the tank? Remember that (1.0 × 105) + (1.0 × 105) = 2.0 × 105.

At a depth of 40 m, the water pressure is 500 kPa. A diver breathing air (78% N2, 21% O2) at this depth would have what partial pressure of oxygen in his lungs?

Answer 1

How did you get 0.08206

Answer 2

A 5.0 L vessel holds 3.0 mol N2, 2.0 mol F2, and 1.0 mol H2 at 273 K. What is the partial pressure of fluorine?

P = nRT /V
P = 6(0.08206)(273) / 5.0
P = 26.88 atm

x(F2) =2/6 = 0.33

Partial pressure = 8.96 atm = 907 kPa


At 298 K, you collect 0.5 L of oxygen over water that has a total pressure of 150 kPa. What is the partial pressure of oxygen? (The partial pressure of water vapor at 298 K is 3.6 kPa.)

Dalton's Law of partial pressures
150 - 3.6 = 146.4 kPa