The triple points of neon and carbon dioxide are $24.57\; K$ and $216.55\; K$ respectively. Express these temperatures on the Celsius and Fahrenheit scales.

The relation between Kelvin and Celsius scales is given by:
$T_{C} = T_{K} - 273.15$
The relation between Celsius and Fahrenheit scales is given by:
$T_{F} = \frac{9}{5} T_{C} + 32$
For neon $(T_{K} = 24.57\; K)$:
$T_{C} = 24.57 - 273.15 = -248.58^{\circ}C$
$T_{F} = \frac{9}{5}(-248.58) + 32 = -447.44 + 32 = -415.44^{\circ}F$
For carbon dioxide $(T_{K} = 216.55\; K)$:
$T_{C} = 216.55 - 273.15 = -56.60^{\circ}C$
$T_{F} = \frac{9}{5}(-56.60) + 32 = -101.88 + 32 = -69.88^{\circ}F$