SO3 + H2O → H2SO4
\(n_{SO_3}=\dfrac{40}{80}=0,5\left(mol\right)\)
Theo PT: \(n_{H_2SO_4}=n_{SO_3}=0,5\left(mol\right)\)
\(\Rightarrow m_{H_2SO_4}=0,5\times98=49\left(g\right)\)
Do hiệu suất phản ứng lá 95%
\(\Rightarrow m_{H_2SO_4}tt=49\times95\%=46,55\left(g\right)\)