We know that 1 pound is approximately equal to 0.4536 kilograms and 1 kilogram is equal to 1000 grams. So, the mass of the sphere in grams is given by:
\[155 \, \text{lb} \times 0.4536 \, \text{kg/lb} \times 1000 \, \text{g/kg} = 70367.3 \, \text{g}\]
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