The formation of nitric oxide (n2(g) + o2(g) imported asset 2no(g)) has a kc value of 4.7 × 10-31. a classmate claims that this reaction must really make a lot of nitric oxide since the exponent is such a large value. explain to the student why her reasoning is correct or flawed.

Answer is: her reasoning is flawed, because Kc is very small, so the concentration of nitric(II) oxide is also very small. 

Balanced chemical reaction: N₂(g) + O₂(g) ⇄ 2NO(g).
The equilibrium constant (Kc) is a ratio of the concentration of the products (in this reaction nitrogen(II) oxide) to the concentration of the reactants (in this reaction nitrogen and oxygen):
Kc = [NO]² / [N₂] · [O₂].
Kc = 4.7·10⁻³¹.
If we take equilibrium concentration of oxygen and nitrogen to be 1 M:
[N₂] = [O₂] = 1 M.
[NO] = √[N₂] · [O₂] · Kc.
[NO] = 6.855·10⁻¹⁶ M; equilibrium concentration of nitric oxide.

1. and 2. question: in which equation? or i don't understand you, 3. a), 4. c), 5. c), 6. b), 7. d), 8. d) if small number is underlined(behind symbol) , b) if big number is underlined(in front of symbol)9. what is underlined there? 10. c)