3Cu+8HNO3\(\rightarrow\)3Cu(NO3)2+2NO+4H2O(1)
CuO+2HNO3\(\rightarrow\)Cu(NO3)2+H2O(2)
nNO=\(\frac{4,48}{22,4}\)=0,2(mol)
\(\rightarrow\)nCu=\(\frac{0,2.3}{2}\)=0,3(mol)
\(\rightarrow\)mCuO=35,2-0,3.64=16(g)
nCuO=\(\frac{16}{80}\)=0,2(mol)
nHNO3=nHNO3(1)+nHNO3(2)=0,3.\(\frac{8}{3}\)+0,2.2=1,2(mol)
CM HNO3=\(\frac{1,2}{0,3}\)=4(M)