I think is oxygen that what i think
C) the scientist made an identification by identifying the amount of drug in her blood and realising it was high
Kc= concentration of product divided by concentration of reactant
NO + NO2 ----> N2O3
Kc =(N2O3) / (No)(NO2)
Kc= ( 1.3 )/{ (3.9)(3.8) }
Kc=0.088 ( answer B)
9.74x 2351 that's the answer
