Questions and answers

What is the partial pressure of oxygen and nitrogen in the air if air contains 20% by volume of oxygen and 80% by volume of nitrogen?

What is the partial pressure of oxygen and nitrogen in the air if air contains 20% by volume of oxygen and 80% by volume of nitrogen?

Atmospheric air contains 20% O2 and 80% N2 by volume and exerts a pressure of 760 mmHg.

What is the mole fraction of oxygen in a gas mixture that is 32% oxygen and 68% nitrogen by volume?

37% of the volume (and therefore 37% of the moles of gas) is oxygen. So: 37 moles of oxygen in 100 moles of solution. The mole fraction = 37/100 = 0.37.

What is the partial pressure of nitrogen in air at atmospheric pressure?

approximately 593 mm Hg
Therefore, at sea level, where atmospheric pressure is known to be 760 mm Hg, the partial pressures of the various gases can be estimated to have partial pressures of approximately 593 mm Hg for nitrogen, 160 mm Hg for oxygen, and 7.6 mm Hg for argon.

What is the mole fraction of nitrogen in air?

0.7808
The mole fraction of nitrogen in air is 0.7808.

What is the normal partial pressure of oxygen?

75 to 100 millimeters
Normal Results Partial pressure of oxygen (PaO2): 75 to 100 millimeters of mercury (mm Hg), or 10.5 to 13.5 kilopascal (kPa) Partial pressure of carbon dioxide (PaCO2): 38 to 42 mm Hg (5.1 to 5.6 kPa) Arterial blood pH: 7.38 to 7.42.

What is partial pressure of oxygen?

The partial pressure of oxygen, also known as PaO2, is a measurement of oxygen pressure in arterial blood. It reflects how well oxygen is able to move from the lungs to the blood, and it is often altered by severe illnesses.

What is the mole fraction of oxygen?

0.147
The mole fraction of oxygen in exhaled air is 0.147 , and the mole percent is 14.7% .

What is the pressure of nitrogen in the atmosphere?

0.78atm
Since nitrogen makes up 78% of the gas particles in a given sample of air, it exerts 78% of the pressure. If the overall atmospheric pressure is 1.00atm, then the pressure of just the nitrogen in the air is 0.78atm. The pressure of the oxygen in the air is 0.21atm.

How do you calculate nitrogen pressure?

The partial pressure of nitrogen is represented by PN2. Dalton’s law of partial pressures states that the total pressure of a mixture of gases is equal to the sum of all of the partial pressures of the component gases. Dalton’s law can be expressed with the following equation: Ptotal=P1+P2+P3+…

What is the atmospheric pressure of oxygen?

As oxygen is 21% of dry air, the inspired oxygen pressure is 0.21×(100−6.3)=19.6 kPa at sea level. Atmospheric pressure and inspired oxygen pressure fall roughly linearly with altitude to be 50% of the sea level value at 5500 m and only 30% of the sea level value at 8900 m (the height of the summit of Everest).

Is nitrogen heavier than air?

Nitrogen gas is only slightly lighter than air and readily mixes with air at room temperature. Cold vapors are more dense and will settle. Liquid nitrogen, a cryogenic liquid, has a very low boil- ing point of –320°F.

What is the maximum covalency of nitrogen?

Even though N atom has 5 electrons in its valence shell, its covalency cannot be 5. It will be 4 only because N can accommodate a maximum of 8 electrons in its outermost shell. When its three 2p electrons bond with H the octet becomes completely filled.