View the step-by-step solution to:

# 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)?

Here is a detailed explanation... View the full answer

• 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

### Why Join Course Hero?

Course Hero has all the homework and study help you need to succeed! We’ve got course-specific notes, study guides, and practice tests along with expert tutors.

### -

Educational Resources
• ### -

Study Documents

Find the best study resources around, tagged to your specific courses. Share your own to gain free Course Hero access.

Browse Documents