You're posting about 20 or more questions with these 5. We are here to help with the emphasis on help but we expect you to do most of the work.
a. The mole fractions are 0.21 for oxygen; 0.78 for nitrogen and 0.01 for argon. Then pO2 = XO2*Ptotal
pN2 = XN2*Ptotal
pAr =XAr*Ptotal.
Having a should allow you to do b,c,d. Post your work if you get stuck.
Air consists of 21 % oxygen, 78 % nitrogen and 1 % argon by volume. Calculate:
* (a) the partial pressures in Pa, if total pressure is 1 atm,
* (b) the concentration in mol m–3, of each gas at 273 K,
* (c) the average molar mass of air,
* (d) the number of oxygen molecules in 15 g air.
1 answer