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Air is roughly 21% O2 and 79% N2. Those two molecules have approximate Molecular Weights of 32 grams per mole and 28 grams per mole, respectively. So if you take a weighted average:
(.21)(32 g/mol) + (.79)(28 g/mol) = 28.84 g/mol
So 28.84 is my estimation of the average MW of air. If you used more accurate values for atomic molecular weights, the percents, and added the additional species which make up "air" then you may come up with a value closer to 28.966.
Please note, however, that there really can't be as hard and fast a definition of the MW of air as there can of H2 for example. This is because the concentration of gases in the atmosphere (and around you, more specifically) is constantly changing, minute to minute, day to day, and year to year.
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Why molecular weight of air is 28.9?
It is the weighted average of the individual molecular weights of the components oxygen and nitrogen. Generally speaking, air is composed of 21% oxygen and 79% nitrogen. Thus the average molecular weight of air is calculated as follows: MW air = (.21)*(MW O2) + (.79)*(MW N2)
How would you set up the following 0.173 mol SiO2 mw 60.1gmol combined with 0.731 mol HCl mw 36.5gmol identify limiting reagent and calculate how many grams of SiCl4 mw 170gmol can be formed.?
Equation = SiO2 + 4HCl -> SiCl4 + 2H20
How many joule equals 1 MW energy?
1 watt/second equal to 1 Joule
How many MW in W?
1,000
What are the 5 organelles functions?
mw
How do you calculate MW to TPH?
1 mw = 4tph
How do you calculate 10 mw windmill power to kw?
1 MW is 1000 kW therefore 10 MW is equal to 10,000 kW.
How much does 1 MW equals in terms of KWH of electricity?
1000
How you can calculate tph to megawatt?
To calculate tph to megawatts you need to know how many tph are in one megawatts. The equation is 1 mw is equal to 4 tph.
Why molecular weight of air is 28.9?
It is the weighted average of the individual molecular weights of the components oxygen and nitrogen. Generally speaking, air is composed of 21% oxygen and 79% nitrogen. Thus the average molecular weight of air is calculated as follows: MW air = (.21)*(MW O2) + (.79)*(MW N2)
How would you describe to someone who is not taking chemistry how they can calculate average atomic mass for an atom Use a real element in your example?
lets say you sample oxgen from the air and you find that 90% of it has molecular weight of 16, 5% has MW of 17, 3% has MW of 18 and 2% has MW of 15. so the avrage MW would be: (16*90+17*5+18*3+15*2)/100 hope it helps zaf
Given mT plus mW equals 180 TUVW must be a parallelogram?
true
How would you set up the following 0.173 mol SiO2 mw 60.1gmol combined with 0.731 mol HCl mw 36.5gmol identify limiting reagent and calculate how many grams of SiCl4 mw 170gmol can be formed.?
Equation = SiO2 + 4HCl -> SiCl4 + 2H20
How many joule equals 1 MW energy?
1 watt/second equal to 1 Joule
Is mw and mW the same in watts . is it the same or is mW stronger voltage then mw?
The units mw and mW are the same. They mean milliwatts. The terms Mw and MW, however, means megawats, which is a billion (1x109) times greater than a mw or a mW.Another AnswerThe correct symbol for a watt is an upper-case 'W'. So the correct symbol for a milliwatt is 'mW' (not 'mw'), and the correct symbol for a megawatt is 'MW' (not 'Mw').
How do you calculate coal consumption in afbc boiler?
how we calculate the coal consumed to generate xxx MW say 12 hrs or 24 hrs in CFBC boiler please help
What does MW?
MW is the abbreviation for megawatts. mW is the abbreviation for milliwatts.
