Air At Altitude Same Percentage Makeup Of Elements?

Components in Dry out Air

Air is a mixture of several gases, where the 2 most ascendant components in dry air are 21 vol% oxygen and 78 vol% nitrogen. Oxygen has a molar mass of xv.9994 g/mol and nitrogen has a tooth mass of 14.0067 one thousand/mol. Since both of these elements are diatomic in air - O₂ and N₂ , the tooth mass of oxygen gas is 32 one thousand/mol and the tooth mass of nitrogen gas is 28 chiliad/mol.

The boilerplate molar mass is equal to the sum of the mole fractions of each gas multiplied by the tooth mass of that particular gas:

Thousand_mixture = (10₁*M₁ + ......+ x_n*M_north)                                        (ane)

where

x_i = mole fractions of each gas
M_i = the molar mass of each gas

The molar mass of dry air is 28.9647 g/mol. Composition and content of each gas in air is given in the figures and the table beneath.

See also Air Density at varying pressure, Density and specific weight at varying temperature, Diffusion Coefficients for Gases in Air,  Dynamic (absolute) and kinematic viscosity, Prandtl Number, Specific heat at varying temperature and Specific heat at varying pressure, Thermal Conductivity, Thermal Diffusivity, Backdrop at gas-liquid equilibrium conditions and Air properties, for other properties of air

Air is usually modeled as a compatible (no variation or fluctuation) gas with properties averaged from the private components.

For total table - rotate the screen!

Components in dry air		Book ratio = Molar ratio compared to dry air		Molar mass	Tooth mass in air		Atmospheric boiling point
Proper name	Formula	[mol/molair]	[vol%]	[g/mol], [kg/kmol]	[g/molair], [kg/kmolair]	[wt%]	[K]	[°C]	[°F]
Nitrogen	N2	0.78084	78.084	28.013	21.872266	75.511	77.4	-195.viii	-320.4
Oxygen	Otwo	0.20946	twenty.946	31.999	6.701942	23.14	90.ii	-183.0	-297.three
Argon	Ar	0.00934	0.934	39.948	0.373025	i.29	87.3	-185.8	-302.v
Carbon dioxide1)	CO2	0.000412	0.0412	44.010	0.018132	0.063	194.seven	-78.five	-109.ii
Neon	Ne	0.00001818	0.001818	twenty.180	0.000367	0.0013	27.2	-246.0	-410.7
Helium	He	0.00000524	0.000524	4.003	0.000021	0.00007	4.two	-269.0	-452.1
Methyl hydride	CHiv	0.00000179	0.000179	sixteen.042	0.000029	0.00010	111.seven	-161.five	-258.7
Krypton	Kr	0.0000010	0.0001	83.798	0.000084	0.00029	119.viii	-153.four	-244.0
Hydrogen	H2	0.0000005	0.00005	2.016	0.000001	0.000003	20.3	-252.9	-423.ane
Xenon	Xe	0.00000009	0.000009	131.293	0.000012	0.00004	165.ane	-108.i	-162.five
Boilerplate molar mass of air					28.9647

¹⁾ A ccording NASA CO₂ level in 1960 aprox. 320 ppm, 1970 aprox. 328 ppm, 1980 aprox. 341 ppm, 1990 aprox. 356 ppm, 2000 aprox. 372 ppm, 2010 aprox. 390 ppm and 2020 aprox. 412 ppm

Back to tiptop

• The water or vapor content in air varies. The maximum wet carrying chapters of air depends primarily on temperature
• The composition of air is unchanged until elevation of approximately 10.000 m
• The average air temperature diminishes at the rate of 0.6^oC for each 100 m vertical height
• "One Standard Atmosphere" is defined equally the force per unit area equivalent to that exerted by a 760 mm column of mercury at 0^oC sea level and at standard gravity (32.174 ft/sec^two )

Other components in air

• Sulfur dioxide - SO_ii - 1.0 parts/million (ppm)
• Nitrous oxide - N_twoO - 0.5 parts/million (ppm)
• Ozone - O₃ - 0 to 0.07 parts/million (ppm)
• Nitrogen dioxide - NO₂ - 0.02 parts/one thousand thousand (ppm)
• Iodine - I_ii - 0.01 parts/million (ppm)
• Carbon monoxide - CO - 0 to trace (ppm)
• Ammonia - NH_iii - 0 to trace (ppm)

Common Pressure level Units oft used every bit alternative to "one Atmosphere"

• 76 Centimeters (760 mm) of Mercury
• 29.921 Inches of Mercury
• ten.332 Meters of Water
• 406.78 Inches of Water
• 33.899 Anxiety of Water
• 14.696 Pound-Force per Foursquare Inch
• 2116.ii Pounds-Force per Square Foot
• 1.033 Kilograms-Force per Square Centimeter
• 101.33 kiloPascal

Come across also Air Density at varying pressure, Density and specific weight at varying temperature, Improvidence Coefficients for Gases in Air,  Dynamic (absolute) and kinematic viscosity, Prandtl Number, Specific oestrus at varying temperature and Specific rut at varying pressure level, Thermal Conductivity, Thermal Diffusivity, Properties at gas-liquid equilibrium conditions and Air properties, for other backdrop of air

Source: https://www.engineeringtoolbox.com/air-composition-d_212.html

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