Question

how to convert 13.1 MeV to kj/mol?

Answer 1

Lets write up a few things:
\[1 eV=1,60217653 * 10^{-19}J\]
\[MeV=1000000 eV =10^{6} eV\]
\[1 kJ=1000 J\]
\[N _{a}=6,02214*10^{23} \frac{ 1 }{ mol }\]
So:
\[13.1MeV*10^{6} \frac{ eV }{ MeV }*1,60217653 * 10^{-19} \frac{ J }{ eV }*10^{-3} \frac{ kJ }{ J }*6,02214*10^{23} \frac{ 1 }{ mol }\]