\(n_{Cu}=\dfrac{12,8}{64}=0,2\left(mol\right)\)

\(2Cu+O_2\underrightarrow{t^o}2CuO\)

0,2 -->0,1---> 0,2

\(a=m_{CuO}=0,2.80=16\left(g\right)\)

\(V_{O_2}=0,1.24,79=2,479\left(l\right)\)

\(n_{Zn}=\dfrac{6,5}{65}=0,1\left(mol\right)\)

a \(Zn+CuSO_4\rightarrow ZnSO_4+Cu\)

   0,1 ---> 0,1------------------> 0,1

b 

\(a=m_{Cu}=0,1.64=6,4\left(g\right)\)

c

\(V_{CuSO_4}=\dfrac{0,1}{0,5}=0,2\left(l\right)\)

a

\(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\downarrow\)

0,05 --> 0,1-----------> 0,05------>0,1

b

\(n_{Cu}=\dfrac{3,2}{64}=0,05\left(mol\right)\)

\(m_{Cu\left(NO_3\right)_2}=0,05.188=9,4\left(g\right)\)

c

\(a=m_{Ag}=108.0,1=10,8\left(g\right)\)

d

\(V_{AgNO_3}=\dfrac{0,1}{0,5}=0,2\left(l\right)\)

\(a/2Fe+3Cl_2\xrightarrow[]{}2FeCl_3\\ b/n_{FeCl_3}=\dfrac{32,5}{162,5}=0,2\left(mol\right)\\2 Fe+3Cl_2\xrightarrow[]{}2FeCl_3\\ n_{Fe}=n_{FeCl_3}=0,2mol \\ m_{Fe}=0,2.56=11,2\left(g\right)\\ c/n_{Cl_2}=\dfrac{0,2.3}{2}=0,3\left(mol\right)\\ V_{Cl_2}=0,3.22,4=6,72\left(l\right)\)

a, \(2Cu\left(NO_3\right)_2\underrightarrow{t^o}2CuO+4NO_2+O_2\)

b, \(n_{Cu\left(NO_3\right)_2}=\dfrac{28,2}{188}=0,15\left(mol\right)\)

Theo PT: \(\left\{{}\begin{matrix}n_{CuO}=n_{Cu\left(NO_3\right)_2}=0,15\left(mol\right)\\n_{O_2}=\dfrac{1}{2}n_{Cu\left(NO_3\right)_2}=0,075\left(mol\right)\end{matrix}\right.\)

\(\Rightarrow m_{CuO}=0,15.80=12\left(g\right)\)

\(V_{O_2}=0,075.24,79=1,85925\left(l\right)\)

c, Ta có: \(n_{NO_2}+n_{O_2}=\dfrac{6,1975}{24,79}=0,25\left(mol\right)\)

Gọi: n_O2 = x (mol)

Theo PT: \(n_{NO_2}=4n_{O_2}=4x\left(mol\right)\)

⇒ 4x + x = 0,25 ⇒ x = 0,05 (mol)

Theo PT: \(n_{Cu\left(NO_3\right)_2\left(LT\right)}=2n_{O_2}=0,1\left(mol\right)\)

\(\Rightarrow m_{Cu\left(NO_3\right)_2\left(LT\right)}=0,1.188=18,8\left(g\right)\)

Mà: H = 80% \(\Rightarrow m_{Cu\left(NO_3\right)_2\left(TT\right)}=\dfrac{18,8}{80\%}=23,5\left(g\right)\)

\(PTHH:2Cu+O_2\overset{t^o}{--->}2CuO\)

\(Mg+2HCl\rightarrow MgCl_2+H_2\)

0,05 -->0,1----->0,05----->0,05

b

\(n_{Mg}=\dfrac{1,2}{24}=0,05\left(mol\right)\)

\(m_{MgCl_2}=0,05.95=4,75\left(g\right)\)

c

\(V_{H_2}=0,05.24,79=1,2395\left(l\right)\)

d

\(V_{HCl}=\dfrac{0,1}{2}=0,05\left(l\right)\)

\(a.2Al+3H_2SO_4->Al_2\left(SO_4\right)_3+3H_2\\ b.n_{Al}=1,5.0,5.0,03=0,0375mol\\ m_{Al}=0,0375.27=1,0125g\\ m_{Al_2\left(SO_4\right)_3}=342\cdot\dfrac{1}{3}\cdot0,03\cdot0,5=1,71g\\V_{H_2}=24,79.0,5.0,03=0,37185L\)

\(a/2Al+3H_2SO_4\xrightarrow[]{}Al_2\left(SO_4\right)_3+3H_2\\ b/n_{H_2SO_4}=0,5.0,03=0,015\left(mol\right)\\ n_{Al_2\left(SO_4\right)_3}=\dfrac{0,015}{3}=0,005\left(mol\right)\\ m_{Al_2\left(SO_4\right)_3}=0,005.342=1,71\left(g\right)\\ n_{Al}=0,005.2=0,01\left(mol\right)\\ m_{Al}=0,01.27=0,27\left(g\right)\\ c/n_{H_2}=0,005.3=0,015\left(mol\right)\\ V_{H_2}=0,015.24,79=0,37185\left(l\right)\)

\(a/2Al+3H_2SO_4\xrightarrow[]{}Al_2\left(SO_4\right)_3+3H_2\)

\(b/30ml=0,03l\\ n_{H_2SO_4}=0,5.0,03=0,0015\left(mol\right)\\ n_{Al}=\dfrac{0,0015.2}{3}=0,001\left(mol\right)\\ m_{Al}=0,001.27=0,027\left(g\right)\\ n_{Al_2\left(SO_4\right)_3}=\dfrac{0,0015}{2}=0,00075\left(mol\right)\\ m_{Al_2\left(SO_4\right)_3}=0,00075.342=0,2565\left(g\right)\)

\(c/n_{H_2}=\dfrac{0,0015.3}{3}=0,0015\left(mol\right)\\ V_{H_2}=0,0015.24,79=0,037185\left(l\right)\)

\(a/2Al+6HCl\xrightarrow[]{}2AlCl_3+3H_2\\ b/n_{Al}=\dfrac{5,4}{27}=0,2\left(mol\right)\\ n_{AlCl_3}=n_{Al}=0,2mol\\ m_{AlCl_3}=0,2.133,5=26,7\left(g\right)\\ c/higro\Rightarrow hydrogen\\ n_{H_2}=\dfrac{0,2.3}{2}=0,3\left(mol\right)\\ V_{H_2}=0,3.24,79=7,437\left(l\right)\\ d/n_{HCl}=\dfrac{0,2.6}{2}=0,6\left(mol\right)\\ V_{HCl}=\dfrac{0,6}{2}=0,3\left(l\right)\)