Answer
$T=1\times 10^4K$
Work Step by Step
We know that;
$T=\frac{2gR_eM}{3R}$
For hydrogen, $M=2\times 10^{-3}\frac{Kg}{mol}$
We plug in the known values to obtain:
$T=\frac{2(9.8)(6.37\times 10^6)(2\times 10^{-3})}{3(8.31)}=1\times 10^4K$