Question

Answer 1

Câu 1 : 

\(3Fe+2O_2\underrightarrow{^{^{t^0}}}Fe_3O_4\)

\(4P+5O_2\underrightarrow{^{^{t^0}}}2P_2O_5\)

Answer 2

Câu 2 : 

\(a.N_2O_5+H_2O\rightarrow2HNO_3\) : Hóa hợp 

\(b.2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\) : Thế 

\(c.Fe_2O_3+3CO\underrightarrow{^{^{t^0}}}2Fe+3CO_2\) : Oxi hóa - khử

 

Answer 3

Câu 3 : 

\(n_{CuO}=\dfrac{2.4}{80}=0.03\left(mol\right)\)

\(CuO+H_2\underrightarrow{^{^{t^0}}}Cu+H_2O\)

\(0.03.....0.03\)

\(V_{H_2}=0.03\cdot22.4=0.672\left(l\right)\)