Gọi \(n_{Cu\left(NO3\right)2\left(pư\right)}:a\left(mol\right)\)
\(n_{Cu\left(NO3\right)2\left(bđ\right)}=0,08\left(mol\right)\)
\(PTHH:2Cu\left(NO_3\right)_2\rightarrow2CuO+O_2+4NO_2\)
_____________a_______a__________0,5a____2a
\(n_{Cu\left(NO3\right)2\left(dư\right)}=0,08-a\left(mol\right)\)
\(n_{CuO}=a\left(mol\right)\Rightarrow\left(0,08-a\right).188+80a=8,56\)
\(\Leftrightarrow a=0,06\left(mol\right)\)
\(\Rightarrow H=\frac{0,06}{0,08}.100\%=75\%\)
\(\left\{{}\begin{matrix}n_{NO2}=0,06.2=0,12\left(mol\right)\\n_{O2}=0,5a=0,03\left(mol\right)\end{matrix}\right.\)
\(M_{khi}=43,2\left(\frac{g}{mol}\right)\Rightarrow d_{M_{khi}/H2}=\frac{43,2}{2}=21,6\)
