PLS HELP "NO LINKS" Given that the mass density of air at 0.987 bar and 27°C is 1.146 kg·m−3, calculate the mole fraction and partial pressure of nitrogen and oxygen assuming the following conditions.
(a) air consists only of these two gases
mole fraction nitrogen:

mole fraction oxygen:

partial pressure nitrogen:

partial pressure oxygen:

(b) air also contains 1.0-mole percent Ar
mole fraction nitrogen:

mole fraction oxygen:

partial pressure nitrogen:

partial pressure oxygen:

partial pressure argon:

All answers need to be in sig fig 4
Thanks!