Question

Na equação abaixo, pq fica 10 elevado a -22 e depois 10 elevado a -11
$4.10^{-20} = \frac{[NO]^2}{0,1.0,1} --\ \textgreater \ [NO]{^2} = 4. 10^{22} --\ \textgreater \ [NO]= 2.10 ^{11}$

Answer 1

$4.10^{-20}= \frac{ [NO]^{2} }{0,1.0,1} \\ \\ 4.10^{-20}= \frac{ [NO]^{2} }{0,01} \\ \\ 4.10^{-20}= \frac{ [NO]^{2} }{ 10^{-2} } \\ \\ 4.10^{-20}. 10^{-2} = \frac{ [NO]^{2} }{ 10^{-2} }. 10^{-2} \\ \\ 4. 10^{(-20-2)} =[NO]^{2} \\ \\ 4. 10^{-22}=[NO]^{2} \\ \\ \sqrt{4. 10^{-22}}= \sqrt{[NO]^{2}} \\ \\ \sqrt{4}. \sqrt{ 10^{-22} }= [NO]^{ \frac{2}{2} } \\ \\ 2. 10^{ \frac{-22}{2} }=NO \\ \\ 2. 10^{-11}=NO \\ \\ NO=2. 10^{-11}$