In a 1.0x10^-6 M soltution of HNO3(aq), identify the relative molar amounts of these species.

Question

H2O , HNO3, H3O+,NO3-, OH-

Answer 1

I don't know what you mean by "relative" molar amounts.
If relative means "about", then
HNO3 = 0
(H3O^+) = about 1E-6 (technically it's slightly more than that because water contributes a little).
(OH^-) = about 1E-14/1E-6 (technically its a little less than this because the H^+ is slightly >1E-6
NO3^- = 1E-6M
(H2O) = about 55.5M

Answer 2

thank you!