Question

Por favor alguém me ajudaaaa!! ^^

Answer 1

2 NO (g) ~> N2(g) + O2(g)

Kc = [produtos] / [ reagente ] ( elevado aos seus coeficientes estequiométricos)

Kc = [N2] . [O2] / [NO]^2

Kc = [0,02] . [0,02]  /  [0,2]^2

Kc = 0,01

Answer 2

$a\,\text{A}\rightleftharpoons{b}\,\text{B}+c\,\text{C}\\\\K_c=\dfrac{[\text{B}]^b\cdot[\text{C}]^c}{[\text{A}]^a}\\\\\\\\2\,\text{NO}_{\,\,\,(g)}\rightleftharpoons\text{N}_{2\,\,\,(g)}+\text{O}_{2\,\,\,(g)}\\\\\left[\text{NO}\right]=0{,}2\,\text{mol}/\ell\qquad\qquad\left[\text{N}_2\right]=0{,}02\,\text{mol}/\ell\qquad\qquad\left[\text{O}_2\right]=0{,}02\,\text{mol}/\ell\\\\\\K_c=\dfrac{\left[\text{N}_2\right]\cdot\left[\text{O}_2\right]}{\left[\text{NO}\right]^2}\\\\\\K_c=\dfrac{0{,}02\cdot0{,}02}{0{,}2^2}\\\\\\K_c=\dfrac{0{,}0004}{0{,}04}\\\\\\\boxed{K_c={0{,}01}}$