A $10 \mathrm{~g}$ mixture of hydrogen and helium is contained in a vessel of capacity $0.0125 \mathrm{~m}^{3}$ at 6 bar and $27^{\circ} \mathrm{C}$. The mass of helium in the mixture is ____________ g. (nearest integer)

Given: $\mathrm{R}=8.3 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$

(Atomic masses of $\mathrm{H}$ and $\mathrm{He}$ are $1 \mathrm{u}$ and $4 \mathrm{u}$, respectively)