CuO
\(\%_{Cu}=\frac{64}{64+16}.100\%=80\%\)
CuS2
\(\%_{Cu}=\frac{64}{64+32.2}.100\%=50\%\)
CuS
\(\%_{Cu}=\frac{64}{64+32}.100\%=66,67\%\)
CuSO3
\(\%_{Cu}=\frac{64}{64+32+16.3}.100\%=44,44\%\)
CuSO4
\(\%_{Cu}=\frac{64}{64+32+16.4}.100\%=40\%\)
Cu2O
\(\%_{Cu}=\frac{64}{64.2+16}.100\%=88,89\%\)
\(\Rightarrow\) Cu2O nhiều đồng nhất
Vậy CuSO4 ít đồng