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What is the number density of oxygen (O 2 ) in dry air at sea level (P = 1013 hPa, T =10C)?

What is the number density of oxygen (O2) in dry air at sea level (P = 1013 hPa, T =10°C)?

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10 comments
  • where 100 and 1000 come from?
    • Laura9695
    • Jan 12, 2018 at 4:41pm
  • thats a very good question
    • danielmburuwanjiru
    • Jan 12, 2018 at 5:02pm
  • so kindly note that ihave given the answer in Kg/m^3
    • danielmburuwanjiru
    • Jan 12, 2018 at 5:02pm
  • this is because 1 kg/m3 = 1000 g/m3 i divided by 1000 so as to give the answer in kg/m^3
    • danielmburuwanjiru
    • Jan 12, 2018 at 5:03pm
  • what's the formula you use in this question?
    • Laura9695
    • Jan 12, 2018 at 5:04pm
  • why times 29 instead of 32?
    • Laura9695
    • Jan 12, 2018 at 5:05pm
  • there are two way of calculating the density of dry air
    • danielmburuwanjiru
    • Jan 12, 2018 at 5:10pm
  • first one is calculated using the ideal gas law, which is given as density of dry air=absolute pressure divided by absolute temperature multiplied by the specific gas constant
    • danielmburuwanjiru
    • Jan 12, 2018 at 5:13pm
  • so this is the formula i have used, the 100 used is the transformation At IUPAC standard temperature and pressure (0 °C and 100 kPa)
    • danielmburuwanjiru
    • Jan 12, 2018 at 5:15pm
  • the second way is by calculating according to a molar form of the ideal gas law
    • danielmburuwanjiru
    • Jan 12, 2018 at 5:17pm

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