\(AO+2HCl\rightarrow ACl_2+H_2\)
x _____________x___________
\(\frac{x.\left(A+16\right)}{x.\left(A+71\right)}=\frac{16}{27}\)
Rút x
\(\frac{A+16}{A+71}=\frac{16}{27}\)
a/ A = 64:Cu
b/\(CuO+H_2\rightarrow Cu+H_2O\)
0,2____0,2 ______0,2
\(n_{CuO}=0,2\left(mol\right)\)
\(\Rightarrow V_{H2}=0,2.22,4=4,48\left(l\right)\)
\(\Rightarrow m_{Cu}=0,02.64=12,8\left(g\right)\)