MA = 8.2 = 16(g/mol)
=> \(m_H=\dfrac{25.16}{100}=4\left(g\right)=>n_H=\dfrac{4}{1}=4\left(mol\right)\)
\(m_C=16-4=12\left(g\right)=>n_C=\dfrac{12}{12}=1\left(mol\right)\)
=> CTHH: CH4
\(M_A=8.2=16\left(\dfrac{g}{mol}\right)\)
\(m_C=\dfrac{75.16}{100}=12g\)
\(m_H=\dfrac{25.16}{100}=4g\)
\(n_C=\dfrac{12}{12}=1mol\)
\(n_H=\dfrac{4}{1}=4mol\)
=> CTHH: CH4