Câu 3:
a,\(3Mg+8HNO_3\rightarrow3Mg\left(NO_3\right)_2+2NO+4H_2O\)
\(MgO+2HNO_3\rightarrow Mg\left(NO_3\right)_2+H_2O\)
\(n_{NO}=0,03\left(mol\right)\)\(\rightarrow\)\(n_{Mg}=0,045\left(mol\right)\)
\(\%m_{Mg}=\dfrac{0,045.24}{1,88}.100\%=57,44\%\)
\(\%m_{MgO}=100\%-57,44\%=42,56\%\)
b, \(\Sigma n_{HNO_3}=\dfrac{0,045}{2}.8+\dfrac{1,88-0,045.24}{24+16}.2=0,22\left(mol\right)\)
\(C_M=\dfrac{n}{V}\Rightarrow V=\dfrac{n}{C_M}=\dfrac{0,22}{0,8}=0,275\left(l\right)\)
Câu 1:
a,\(N_2+O_2\rightarrow2NO\)
\(2NO+O_2\rightarrow2NO_2\)
\(4NO_2+O_2+2H_2O\rightarrow4HNO_3\)
b, \(N_2+3H_2⇌2NH_3\)
\(NH_3+HNO_3\rightarrow NH_4NO_3\)
Câu 2:
a, \(2Na_3PO_4+3Mg\left(NO_3\right)_2\rightarrow Mg_3\left(PO_4\right)_2+6NaNO_3\)
b, \(Al+4HNO_{3\left(l\right)}\rightarrow Al\left(NO_3\right)_3+NO+2H_2O\)
Giúp vs ạ :
