\(n_{Mg}=\dfrac{6}{24}=0,25\left(mol\right)\)
\(n_{O_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PT: 2Mg + O2 ➝ 2MgO
Trước 0,25 0,1 0
Trong 0,2 0,1 0,2
Sau 0,05 0 0,2
nMgO = 0,2.40 = 8 (g)
PTHH : \(2Mg+O_2\rightarrow2MGgO\)
\(n_{Mg}=\dfrac{m}{M}=\dfrac{6}{24}=0,25\left(mol\right)\)
\(n_{O_2}=\dfrac{V}{22,4}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
Theo PT ta có : 2mol..........2mol
=> 0,25mol ...................x
=> \(n_{MgO}=x=\dfrac{0,25.2}{2}=0,25\left(mol\right)\)