\(n_{Mg}=\dfrac{4,8}{24}=0,2\left(mol\right)\)
a) Pt : \(2Mg+O_2\underrightarrow{t^o}2MgO|\)
2 1 2
0,2 0,1
b) \(n_{O2}=\dfrac{0,2.1}{2}=0,1\left(mol\right)\)
\(V_{O2\left(dktc\right)}=0,1.,22,4=2,24\left(l\right)\)
Chúc bạn học tốt
a) PTHH: \(2Mg\) \(+\) \(O_2\) → \(MgO\)
b) \(n_{Mg}=\dfrac{m}{M}=\dfrac{4,8}{2,4}=2\) \(\left(mol\right)\)
\(2Mg\) \(+\) \(O_2\) → \(MgO\)
2 mol → 1 mol
\(V_{O_2}=n.22,4=1.22,4=22,4\) \(\left(mol\right)\)