1 Å = 1x10^{-10} m

1 km = 1x10^{3} m

1 mile = 1609 m

**$\mathbf{50}\mathbf{\times}{\mathbf{10}}^{\mathbf{12}}\mathbf{}\mathbf{\u212b}\mathbf{}\mathbf{\times}\frac{\mathbf{1}\mathbf{\times}{\mathbf{10}}^{\mathbf{-}\mathbf{10}}\mathbf{}\mathbf{m}}{\mathbf{1}\mathbf{}\mathbf{\u212b}}$ = 5.0x10 ^{4} m**

Many chemistry conferences have held a 50-Trillion Angstrom Run (two significant figures). How long is this run in kilometers and in miles? (1 Å = 1 × 10^{−10} m)

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