Câu III
a) \(n_{N_2}=\dfrac{5,6}{22,4}=0,25\left(mol\right)=>m_{N_2}=0,25.28=7\left(g\right)\)
\(m_{Zn}=0,15.65=9,75\left(g\right)\)
b) \(V_{O_2}=0,75.22,4=16,8\left(l\right)\)
\(V_{NO_2}=0,2.22,4=4,48\left(l\right)\)
Câu IV
\(\left\{{}\begin{matrix}\%Fe=\dfrac{56.2}{160}.100\%=70\%\\\%O=100\%-70\%=30\%\end{matrix}\right.\)
\(\left\{{}\begin{matrix}\%Ca=\dfrac{40.1}{100}.100\%=40\%\\\%C=\dfrac{12.1}{100}.100\%=12\%\\\%O=\dfrac{16.3}{100}.100\%=48\%\end{matrix}\right.\)
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