Final answer:
The substance produced by the decay of Ytterbium-175 is Erbium-175, with a mass of 175.0 amu.
Step-by-step explanation:
The name and mass of the substance produced by the decay of Ytterbium-175 is Erbium-175, with a mass of 175.0 amu. When Yb-175 undergoes decay, it transforms into one of its neighboring isotopes on the periodic table, which in this case is Erbium (Er). Yttrium (Y), Thulium (Tm), and Lutetium (Lu) are elements nearby Yb on the periodic table, but based on the options provided and the atomic mass unit (amu) being the same (175.0), Erbium is the correct product of decay. Therefore, the correct answer is b) Erbium-175, 175.0 amu.