Đặt CTHH là \(C_xH_yO_zNa_t\)
\(2C_xH_yO_zNa_t+\left(\dfrac{4x+3t+y-2z}{2}\right)O_2--to->2xCO_2+tNa_2CO_3+yH_2O\left(1\right)\)
=>\(n_{O_2}=\dfrac{2,24}{22,4}=0,1\left(mol\right)\)
\(n_{CO_2}=0,1\left(mol\right)=>n_C\left(B\right)=n_{CO_2}+n_{Na_2CO_3}=0,1+0,05=0,15\left(mol\right)\)
\(n_{H_2O}=\dfrac{0,9}{18}=0,05\left(mol\right)=>n_H=2n_{H_2O}=2.0,05=0,1\left(mol\right)\)
\(n_{Na_2CO_3}=\dfrac{5,3}{106}=0,05\left(mol\right)=>n_{Na}=2n_{Na_2CO_3}=2.0,05=0,1\left(mol\right)\)
ĐLBTKL:
\(m_B=5,3+0,9+\left(0,1.44\right)-\left(0,1.16\right)=9\left(g\right)\)
=>\(m_C=0,15.12=1,8\left(g\right)\)
=>\(m_H=0,1\left(g\right)\)
=>\(m_{Na}=23.0,1=2,3\left(g\right)\)
=>\(m_O=9-1,8-0,1-2,3=4,8\left(g\right)\)