a, PTHH : \(2Mg+O_2\rightarrow2MgO\)
-> Sau phản ứng thu được sản phẩm là MgO .
\(n_{Mg}=\frac{m_{Mg}}{M_{Mg}}=\frac{9,6}{24}=0,4\left(mol\right)\)
- Theo PTHH : \(n_{MgO}=n_{Mg}=0,4\left(mol\right)\)
-> \(m_{MgO}=n.M=0,4.\left(24+16\right)=16\left(g\right)\)
b, Theo PTHH : \(n_{O_2}=\frac{1}{2}n_{Mg}=\frac{1}{2}.0,4=0,2\left(mol\right)\)
-> \(V_{O2}=n_{O_2}.22,4=0,2.22,4=4,48\left(l\right)\)
\(n_{Mg}=\frac{9,6}{24}=0,4\left(mol\right)\)
a.\(2Mg+O_2\rightarrow2MgO\)
MgO: Magie oxit
\(n_{MgO}=n_{Mg}=0,1\left(mol\right)\)
\(\rightarrow m_{MgO}=0,4.40=16\left(g\right)\)
b. \(n_{O2}=\frac{nMg}{2}=0,2\left(mol\right)\)
\(\rightarrow V_{O2}=0,2.22,4=4,48\left(l\right)\)
\(\rightarrow V_{KK}=\frac{4,48}{20\%}=22,4\left(l\right)\)
2Mg | + | O2 | → |
2MgO |
0.4----0,2-----0,4 mol
nMg=9,6 \24=0,4 mol
=>mMgO=0,4.40=16 g
b, Theo PT : nO2=12.0,4=0,2(mol)
-> VO2=nO2.22,4=0,2.22,4=4,48(l)