\(n_{Mg}=\dfrac{2.4}{24}=0.1\left(mol\right)\)
\(2Mg+O_2\underrightarrow{^{^{t^0}}}2MgO\)
\(0.1........0.05........0.1\)
\(m_{MgO}=0.1\cdot40=4\left(g\right)\)
\(V_{O_3}=0.05\cdot22.4=1.12\left(l\right)\)
a: \(2Mg+O_2\rightarrow2MgO\)
b: \(n_{Mg}=\dfrac{2.4}{24}=0.1\left(mol\right)\)
=>nMgO=0,1mol
\(m_{MgO}=0.1\cdot64=6.4\left(g\right)\)
c: \(n_{O_2}=0.05\left(mol\right)\)
=>\(V=0.05\cdot22.4=1.12\left(lít\right)\)
`a) 2Mg + O_2 -> (t^o) 2MgO`
`b) n_{Mg} = (2,4)/(24) = 0,1 (mol)`
Theo PT: `n_{MgO} = n_{Mg} = 0,1 (mol)`
`=> m_{MgO} = 0,1.40 = 4 (g)`
`c)` Theo PT: `n_{O_2} = 1/2 n_{Mg} = 0,05 (mol)`
`=> V_{O_2} = 0,05.22,4 = 1,12 (l)`
2Mg+O2-to>2MgO
0,1----0,05----0,1
n Mg=0,1 mol
=>m MgO=0,1.40=4g
=>VO2=0,05.22,4=1,12l