Posted by **mike** on Saturday, April 26, 2008 at 1:48pm.

An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m. Assume that the air in the room is composed of 79% nitrogen (N2) and 21% oxygen (O2). At a temperature of 27°C and a pressure of 1.01 105 Pa, what is the mass (in grams) of the air?

- physics -
**DrBob222**, Saturday, April 26, 2008 at 4:21pm
PV = nRT

- physics -
**jessica**, Tuesday, June 24, 2014 at 11:03pm
volume = 2.5 x 4 x 5 = 50

temperature = 22+273.15 = 295.15 k

pressure = 1.01x 10^5 pa

79% of N2 = 0.79

21% of O2 = 0.21

pv = nrt

1.01 x 10^5 x 50 = n x 8.31 x 295.15

n= 2059

n = mass / mass over mole

mass= 2059 x (0.79 x 14*2+0.21 *32)

mass = 5.9*10^4

- physics -
**jessica**, Tuesday, June 24, 2014 at 11:04pm
oh just change the temperature and the pressure in my equation. I got the wrong question but overall method is the same. Good luck!

## Answer This Question

## Related Questions

- Physics - An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m...
- Physics - An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m...
- Physics - An apartment has a living room whose dimensions are 2.5 m 4.8 m 5.9 m...
- Physics - A class of 11 students taking an exam has a power output per student ...
- physics - A room has the dimensions 3.0 m by 4.0 m by 4.0 m . The air in the ...
- physics - A class of 11 students taking an exam has a power output per student ...
- Physics - A class of 11 students taking an exam has a power output per student ...
- Physics - 60) A class of 10 students taking an exam has a power output per ...
- Math - For a math homework assignment, Karla found the area and perimeter of a ...
- physical chemistry - 1 kg aluminum dumbbell initially held 2 meters above the ...

More Related Questions