Molarity of nitrate

Question

You measure your fish tank water and find there is an NO3 concentration of 0.25 g/L What is the molaritu of the nitrate in your tank?

Answer 1

Molarity=mol/L. 1 mol NO3 is 62 g.

 

(0.25 g NO3)/(1 L) * (1 mol NO3)/(62 g) = 0.004 mol