The pH of a nitric acid solution is 1.2. What is the concentration of nitrate ion in the solution?

Any help would be greatly appreciated, Thank you!!

Dani, or Mandy. Please stop changing names. Why would a volunteer tutor a kid that comes in disguises each time?

Concentrtion H+ = [H+] = antilog 1.2= 15.8M

pH= log[H+] so...
[H+]= antilog pH