An astronomer identifies several non-fusing dense stellar cores in a nearby star cluster.
Given that the mass of the Sun is M⊙=2.0×1030 kgM_{\odot} = 2.0 \times 10^{30} \text{ kg}M⊙=2.0×1030 kg, which of the following observed core masses cannot belong to a stable white dwarf?
2.3×1030 kg2.3 \times 10^{30} \text{ kg}2.3×1030 kg
2.7×1030 kg2.7 \times 10^{30} \text{ kg}2.7×1030 kg
2.9×1030 kg2.9 \times 10^{30} \text{ kg}2.9×1030 kg
2.5×1030 kg2.5 \times 10^{30} \text{ kg}2.5×1030 kg
