Ask Experts Questions for FREE Help !
Ask
    hansi bhakuni's Avatar
    hansi bhakuni Posts: 1, Reputation: 1
    New Member
     
    #1

    Jan 16, 2010, 12:20 AM
    Molecular weight of air
    How to calculate molecular weight of air
    Unknown008's Avatar
    Unknown008 Posts: 8,076, Reputation: 723
    Uber Member
     
    #2

    Jan 16, 2010, 12:35 AM

    Well, all you can do is approximate it.

    What is the composition of air?
    Nitrogen gas 78%
    Oxygen 21%

    An approximate molecular weight would be the average of those two gases which are the most abundant.

    78% is of mass 28 g
    21% is of mass 32 g.

    100% would have approximately

Not your question? Ask your question View similar questions

 

Check out some similar questions!

If CO2's molecular weight is 3x heavier than air, how can it rise into our atmosphere [ 3 Answers ]

I hear and read that CO2 (weight:12+16+16=44) causes global warming. The EPA has even designated it as a pollutant. Yet it weighs three times the average molecular weight of air (78% N=14, 21% O=16 and .9% Ar=40). If CO2 is heavier than air, and there is only .038% of our atmosphere, is there...

Weight of air over lake [ 3 Answers ]

I was trying to solve this problem, very simply it is: what is the weight of water over lake superior? I did some research and deciced top solve the problem in atmosphere levels But I had no idea of how to use units of volume, mass, and mainly pascals(air preassure) this is what my plan...

Molecular Weight; Molarity? [ 7 Answers ]

The molecular weight of NaCl is 58.44 grams/mole. If you had a 1.0 molar solution (1.0 M) you would have to put 58.44 g of salt in 1.0 liter of solution. How many moles of NaCl would you have in 100 mL of this solution?

Molecular genetics [ 1 Answers ]

Hello every one. I'm finding difficulties to answer this question, can anyone help me to find the correct anwer. Please I really need it soon for my final report lab. The question is, briefly indicate the structural features of minor groove ligands. And another thing I need to write a short intro...


View more questions Search