\(n_{O_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH:
\(2R+O_2\underrightarrow{t^o}R_2O_{ }\)
Theo PT ta có: \(n_R=2.n_{O_2}=2.0,1=0,2\left(mol\right)\)
\(\Rightarrow M_R=\dfrac{2,4}{0,2}=12\left(g/mol\right)\)
Vậy kim loại R là Cacbon (C)
\(n_{O_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
PTHH: \(2R+O_2\underrightarrow{t^o}2RO\)
Theo PT ta có: \(n_R=2.n_{O_2}=2.0,1=0,2\left(mol\right)\)
\(\Rightarrow M_R=\dfrac{2,4}{0,2}=12\left(g/mol\right)\)
Vậy R là Cacbon (C)