% mO (NO2) \(\approx70\%\)
\(\text{% mO}\left(PbO\right)\approx7,2\%\)
\(\text{% mO}\left(Al_2O_3\right)\approx47\%\)
\(\text{% mO}\left(Fe_3O_4\right)\approx28\%\)
Vậy NO2 có % mO nhiều nhất.
* \(NO_2\)
\(M_{NO_2}=46\left(g/mol\right)\)
\(\%O=\dfrac{16.2}{46}.100\%\approx70\%\)
* \(PbO\)
\(M_{PbO}=223\left(g/mol\right)\)
\(\%O=\dfrac{16}{223}.100\%\approx7\%\)
* \(Al_2O_3\)
\(M_{Al_2O_3}=102\left(g/mol\right)\)
\(\%O=\dfrac{3.16}{102}.100\%\approx47\%\)
* \(Fe_3O_4\)
\(M_{Fe_3O_4}=232\left(g/mol\right)\)
\(\%O=\dfrac{4.16}{232}.100\%\approx28\%\)
Vậy Oxit có \(\%O\) cao nhất là \(NO_2\)
- \(NO_2\)
\(\%O=\dfrac{16.2}{46}.100\%\approx69,5\%\)
- \(PbO\)
\(\%O=\dfrac{16.1}{223}.100\%\approx7\%\)
- \(Al_2O_3\)
\(\%O=\dfrac{16.3}{102}.100\%\approx47\%\)
- \(Fe_3O_4\)
\(\%O=\dfrac{16.4}{232}.100\%\approx27,5\%\)
