[tex]\bf \begin{array}{ccll}
\stackrel{mL}{hardener}&\stackrel{resin}{container}\\
\text{\textemdash\textemdash\textemdash}&\text{\textemdash\textemdash\textemdash}\\
50&1\\
x&19
\end{array}\implies \cfrac{50}{x}=\cfrac{1}{19}\implies \cfrac{50\cdot 19}{1}=x\implies \stackrel{mL}{950}=x
\\\\\\
\textit{now, there are 1000 mL in 1 liter, so }950~\underline{mL}\cdot \cfrac{L}{1000~\underline{mL}}
\\\\\\
\cfrac{950}{1000}L\implies 0.95~L[/tex]