2C4H10 + 13O2 → 8CO2 + 10H2O (1)
CO2 + Ca(OH)2 → CaCO3 + H2O (2)
\(n_{CaCO_3}=\dfrac{15}{100}=0,15\left(mol\right)\)
Theo PT2: \(n_{CO_2}=n_{CaCO_3}=0,15\left(mol\right)\)
\(n_{CO_2}\left(1\right)=n_{CO_2}\left(2\right)=0,15\left(mol\right)\)
Theo PT1: \(n_{C_4H_{10}}=\dfrac{1}{4}n_{CO_2}=\dfrac{1}{4}\times0,15=0,0375\left(mol\right)\)
\(\Rightarrow m_{C_4H_{10}}=0,0375\times58=2,175\left(g\right)\)