We can do this by using the molar mass of each gas. The molar mass of helium (He) is approximately 4 g/mol and the molar mass of nitrogen (N2) is approximately 28 g/mol.
For helium:
\[ \text{Moles of He} = \frac{0.250 \, \text{g}}{4 \, \text{g/mol}} = 0.0625 \,
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