Problem: 1. Consider a 2 M⊙ neutron star. The mass of a neutron is 1.67 × 10−24 g,
and 1 M⊙ = 2 × 1033 g.
(i) How many neutrons are in this neutron star? (1 point)
A. 6.0 × 1023 neutrons
B. 1.2 × 1023 neutrons
C. 1.2 × 1057 neutrons
D. 2.4 × 1057 neutrons
E. 6.7 × 109 neutrons
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